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The Worst Thing About My Sister (Hardback) Award-winning author

by Jacqueline Wilson (author)

Suitable for 9 - 11 years

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This item has 5 stars of a maximum 5

Rated 5/5 from 15 ratings

1 review (Add a review)

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Product description

Being a sister isn’t always easy – but what’s the worst thing about yours?

Marty and her sister Melissa couldn’t be more different. Tomboy Marty loves playing football, hiding in her secret den and helping with DIY. Meanwhile, Melissa loves Justin Bieber and all things pink, girly and pretty. These chalk-and-cheese sisters usually get on, despite their occasional scraps. But that all changes when Mum tells them they have to share a room! For Marty, sharing a bunk and losing her private sanctuary turns out to be the very worst thing about having a sister. But when disaster strikes, the girls discover that being too close for comfort can have unexpected benefits. Will they finally have the chance to become not just sisters, but true friends?

Product Details





Lexile measure

770L Lexiles are the global standard in reading assessment. They are unique as they are able to measure a child and a book on the same scale – ensuring the right book gets to the right child at the right time.

For more details see What is a lexile?.

Accelerated Reader

AR book level: 4.6; Middle years; 5.0 points




Jacqueline Wilson

Photo of Jacqueline Wilson


  1. Emily
    on 5 March 2012


    This is a great book I used the world book day token to get this £5.99 WOW amazing price from an amazing place !!!

    5out of 5

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What kids think

  1. supergirl5
    on 25 February 2015

    this is a great book it is so funny and loveing marty and millisa really need each other i wish that they could see that from the very start i would love to become a famos writer like jackuline wilson 1 day

  2. icecream2020
    on 9 October 2014

    Best book ever !!!!!!

  3. 2005olivia20
    on 18 August 2014

    Very good book. Seems as if Jacky has gone through the same thing! But it is actually true: most sisters don’t relate TOO well. Laughing together one minute, fighting the next!

  4. Purple-Royalty
    on 30 June 2014

    This book is amazing telling you about the bond between to COMPLETELY DIFFERENT PEOPLE. (I wish that i had a bonding in my life with my sister)!

    5out of 5
  5. Sportsgal
    on 21 June 2014

    Had it signed by Jacky at Hay Festival when I was eight! Wow!

    5out of 5
  6. tomgates27
    on 17 March 2014

    good book first time but boring next

    3out of 5
  7. Spidergirl
    on 8 March 2014

    I love this book because it is like me and my little sister which makes it so cute

  8. books2000
    on 8 March 2014

    its good

  9. sparklesheep02
    on 7 March 2014

    This book had me in stitches! It reminded me of how my sister and i used to be! Although, i was the girly one! I felt for Marty and especially when her comic was ripped up, and yes, i admit, she took Melissa’s eye pencil BUT it was mean of her to rip up her lovely comic. Read this book!

    4out of 5
  10. bookaholic202
    on 7 March 2014

    I like this book because its all about how hard it is to have an older sibling. Anyone who has a sister will relate.

  11. roseyclo
    on 6 March 2014


  12. lebbyland27
    on 6 March 2014

    once again, a Jacqueline Wilson book which comes out perfect. I love this book and when it came out I read it several times, the pictures are brilliant and it just gives the book a nice look. nick sharratt is a really good illustrator, but I coloured the pictures and now they look even better

    5out of 5
  13. Catherine0703
    on 6 March 2014

    Heart warming story about two sisters that don’t get along very well

  14. bianca9
    on 5 March 2014

    tow sisters called Melissa and Marty dont get along very well!

    5out of 5
  15. wing4
    on 5 March 2014

    This book deserves to be In the top 10

  16. zippy123
    on 5 March 2014

    Great book by a great author. Good book to read.

  17. Cheerforevers
    on 5 March 2014

    This is about two sisters Melissa and Marty who don’t get along very well.

  18. pinkxxbibs
    on 4 March 2014

    This book is just so true about sister ship and very humorous

  19. Aimeemitch
    on 4 March 2014

    Absolute favourite book love it highly recommend to ages 6+

    5out of 5
  20. hihi3933
    on 27 February 2014

    It shows you what your releshonship with your brother or sister can be. Very touching but lovely story to read

    5out of 5
  21. sportyozzie
    on 25 February 2014

    This book is really good, if you have not yet read it then you should. I think it is the best book ever! And by the way Jacqueline Wilson has expired me to read more

    Thankyou for reading have a nice day.

  22. crazydiamonddani11
    on 24 February 2014

    i love it i feel sorry for melissa when she goes in hospital

    5out of 5
  23. coolreader123
    on 30 January 2014

    This book was really cool it was so awesome how one dramatic accident could change her life but this book is really helpful if you have a sister

    2out of 5
  24. dishaa
    on 24 January 2014

    i will bye this book in my school book fair because i think this is my story and i agree with marty

    5out of 5
  25. 4592aziz
    on 27 October 2013

    It is a very good book

  26. Kennythecat646
    on 20 October 2013

    this book shows only childs that it is good not to to have a sister or brother . and it shows what can happen if you keep a secret.

    5out of 5
  27. JapaneseStar
    on 2 October 2013

    I thought it was really good it reminds me of me and my little sister good book Jacky! :-)

    5out of 5
  28. Lauren7777
    on 16 July 2013

    wow im speechless amazin best book by jacky

  29. silkypetal
    on 2 July 2013

    i have not read it but hope that it is good tell me about this

  30. josh40
    on 29 June 2013

    I loved it because it is funny.

    5out of 5
  31. BFFGirl122
    on 29 June 2013


    5out of 5
  32. Chocolatelover10
    on 18 June 2013

    This book was really funny and quite realistic i really enjoyed reading this though I do think the title’s mean.

    4out of 5
  33. algeria123
    on 12 June 2013

    its the best book

    4out of 5
  34. brooke-pony
    on 8 June 2013

    This book is about two sisters, Melissa and Martina (Marty), this story is from Marty’s point of view which is good because you get to see it from tomboy Marty’s eyes.

    5out of 5
  35. jackyfan1
    on 7 June 2013

    i like its the best book ever

    5out of 5
  36. axle
    on 30 May 2013

    I really enjoyed reading this and I think it’s true to life. I think if two different sisters were made to share a room it would be like how Jacqueline wrote it.

  37. candyfloss2004
    on 25 May 2013

    I loved this book its one of my favourite’s! Marty and Mellissa always fight non stop. Then they had to share a room. Next thing you know they have lots more arguments which results in Mellissa having to go hospital. This book teaches a good lesson about being kind to your brothers and sisters.

  38. agentab
    on 18 April 2013

    im on martys side

  39. justlovebooks45
    on 19 March 2013


    5out of 5
  40. CookieM
    on 8 March 2013

    Marty has to give up her room and share with her sister and this turns out to be not half as bad as Marty imagines. I loved reading this book.

    5out of 5
  41. bugzy72
    on 7 March 2013

    its a good book

  42. samcharlie123
    on 5 March 2013

    A book about 2 sisters who are completely different. Marty, the tomboyish younger sister and Melissa the girly older one.

    A really great book by Jacky Wilson!

    5out of 5
  43. lmdrld
    on 5 March 2013

    This is about two sisters who are different in so many ways.

  44. lap312i
    on 4 March 2013

    i’d love to read this book

  45. Sherlock25
    on 4 March 2013

    As I have two little sisters I can relate to this book! I enjoyed this books so much that I read it in less than a day! 5 starts :)

  46. onedirection2004
    on 16 February 2013

    Quite a good book but not one of the best.

    By Ella

    4out of 5
  47. Emster123
    on 10 January 2013

    I love this book! In my opinion its very different to all the other books that jacqueline wilson has wrote. Its funny and heart warming and i love how its written from Marty’s point of view and how she see’s her sister Melissa is reacting. I would definitely hate to be in their household though!

    5out of 5
  48. jemma2000
    on 1 November 2012

    This book is very good I recomend this book to all Jacqueline Wilson book lovers. Watch the trailer on YouTube and read he book and found out how good the book is for yourself

    5out of 5
  49. Jennicom
    on 14 October 2012

    I think this book is hilarious. Marty is very funny and Melissa is such a girl it is hard to belive they are sisters!

  50. MineMouse
    on 24 September 2012

    I Am reading this and I Love It My sister is the same! I Love this Book And Hope to finished it to see what happens next!!!

  51. Cherry88
    on 17 September 2012

    I think is book is really good because its a bit like me and my little sister!

    5out of 5
  52. Ausomendo
    on 16 September 2012

    Ausome loved it

    5out of 5
  53. BookWorm12377
    on 31 August 2012

    loved it

  54. tatiteddy2002
    on 30 June 2012

    omg this book is amazing

    5out of 5
  55. rachellen1
    on 27 June 2012

    brilliant book loved it 10/10

    5out of 5
  56. princess11122
    on 12 June 2012

    great book again from jacqueline wilson. loved every minute of it. i recommend it to girls age 11-14. (:

    5out of 5
    on 4 June 2012

    I can’t believe this Melissa and Marty are best friends sisters

    5out of 5
  58. purplethunder
    on 20 May 2012

    I really really enjoyed it! Marty is so funny!

    5out of 5
  59. Princessforever58
    on 19 May 2012

    I think this book is amazing! It is very realistic because the topic relates to a lot of people. The story line is creative, making it funny and a pleasure to read.

  60. alexrusso1
    on 10 May 2012

    I loved it but I nearly cried when Mellisa had to go to HOSPITAL.

    5out of 5
  61. alix2000
    on 29 April 2012

    i am not far into this book and i am loving it i would say children from the age of 10 should read this because it get upseting what happens. read it to find out whay happens

    4out of 5
  62. secret7
    on 21 April 2012

    I loved this book. It was very interesting and kept me hooked from the very beginning. Icould not put the book down!

    5out of 5
  63. destiny0708
    on 12 April 2012

    Loved It!! Best book ever!!! Worth reading!!!!!

    5out of 5
  64. GogirlOMG
    on 2 April 2012

    !!!OMG!!! What the ???? This book was amazing !! I loved it, it was great. I really enjoyed it, it was fun, exciting and interesting.

    It had a very reliable moral.

    It is the BEST book ever.

  65. 49sparky49
    on 27 March 2012

    I love this book i especially like the ending

  66. srsrockz
    on 25 March 2012

    this is a really really gud book!!!

    5out of 5
  67. harrystyles10
    on 18 March 2012

    I really want to read this.

  68. KarlMagic33
    on 7 March 2012

    If I was in it, it would be called the wourst thing about my brother. Really Good!

  69. nikki657
    on 6 March 2012

    cant wait to read

  70. mariefamero09
    on 4 March 2012

    I think it is great!

  71. moonlight4
    on 3 March 2012

    this book was wonderful and i cried when Melissa went to hospital

  72. bluebull100
    on 3 March 2012

    this book is really good and gives you an idea of what some sisters are like

    5out of 5
  73. sweethart184
    on 2 March 2012

    i love this book

  74. lemonhoneysss10
    on 2 March 2012

    This book is very short and written for younger children. It has very big print and a quarter of the book is excerpts of other jacqueline wilson books!

  75. kicky105
    on 1 March 2012

    This is a great book that most children can relate to. It follows the continuous feud of Melissa and Marty, two sisters, but when their fighting goes wrong, will it bring them closer or tear them apart? You’ll have to read the book to find out!

  76. kola5689
    on 1 March 2012

    I have read this book loads of times and I can relate to this because I have a sister exactly like Melissa. It is very intresting and funny when Marty has to wear a dress, it’s hilarous.

  77. sisterandbrother117
    on 1 March 2012

    I like this book because I am a sister and all of that in that book means that sometimes I can be the worst sister ever to my brother and I like it because of all the fancy pants words (i learnt that at school of Miss Venables soon to be Mrs Woodly)

        Jacquline Wilson is the best authour on earth I dont like any other books than Jacquline Wilson they are just superb.Your the best Jacquline Wilson.
  78. indigobeam
    on 1 March 2012

    I am one of Jacqueline Wilson’s biggest fans. I have read all her books, and loved every single one. The Worst Thing About My Sister had a powerful message behind it, portrayed in an interesting way, perfect for younger readers. I wouldn’t recommend this book for my age, but defiantly for younger.

  79. salimisra
    on 1 March 2012

    this is jacqueline wilsons new book which i have read and i think is great but it gets sad at the end but then every thing gets sorted out. it is a must read book!

    5out of 5
  80. StarstoneShyElk
    on 29 February 2012

    i love it everyone should its a fab book!

  81. xxcandyx
    on 29 February 2012

    Excellent Enjoyed it SOOO Much!!

  82. rog2
    on 28 February 2012

    it was amazingly good!

    5out of 5
  83. saphirelillyrose
    on 26 February 2012

    The worst thing about my sister was so fun to read!

    Shhhh dont tell my mum but I read the hole book in one night it took me about 6 hours!

  84. diaryofawimpykid16
    on 26 February 2012

    I am not a girly girl but i so want to read this!

  85. bella-
    on 26 February 2012

    i loved it! i am kinda like both of them coz i love my make-up and tight tops and skirts but i hate wearing dresses sometimes! especially frilly girlly-girl dresses!

    5out of 5
  86. jacquelinewilsonmad365
    on 21 February 2012

    This book was amazing. I am Jacky’s biggest fan and read this book in about 2 days! Not that it’s short I am just a fast reader. AMAZING, GRIPPING, EXCITING!!! 10/10

    5out of 5
  87. kitty94
    on 20 February 2012

    this book is AMAZING and when i say AMAIZING i mean AMAZING i read it over the spread of two days kit was that AMAIZING! :)

    5out of 5
  88. lids
    on 20 February 2012

    it was so good

    * five stars

    5out of 5
  89. lararocks
    on 19 February 2012

    I love this book its amazing Jacqueline Wilson is my fav wrighter

    5out of 5