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Suitable for 9 - 11 years

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Rated 4/5 from 5 ratings

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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






Yearling (imprint of Random House Children's Books)

Date published

December 6th, 2012

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


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What kids think

  1. Unicorn288
    on 2 March 2017

    I very much liked this book. It was very funny and expressed how to the relationships between two very different siblings( or even just people in general ) argue. In my opinion its a very good book and I would recommend it.

    5out of 5
  2. Smartina66
    on 31 January 2016

    Awesome book

  3. Ruby1424
    on 29 January 2015

    this book is amazing well, far only 21 pages in the sneek peek thingy i just eally wanna read more but its elevan fourty five!! ohhhh,its amazin (only 21 pages in the sneek peek for your info!)

    5out of 5
  4. Mimi9403
    on 6 January 2015

    I think this book is one of the best ones I have read because the ideas used in the hospital when Marty helps painting the hospital wall!

    5out of 5
  5. haz11
    on 1 October 2014

    it is lovely

    5out of 5
  6. 2005olivia2
    on 25 August 2014

    Too awesome for words! I read it 4 times and then realized it is just like me and my sister.(except for the fact that we share a room AND I don’t draw comics, I’m not even interested in them! 4/5.

  7. rainbowrosey
    on 28 May 2014

    Epic I want a book cslled the best thing about my sister by jacaquline wilson

    5out of 5
  8. Jolu123456
    on 5 April 2014

    This book is totally amazing. It is a heart warming novel about two quarreling sisters who when one of them gets hurt become extremely close

    5out of 5
  9. Doodle10
    on 19 March 2014



  10. loobyloulou123
    on 9 March 2014

    I love this book I’ve read it twice and have discovered that its a bit like me and my sister.

    4out of 5
  11. Potterfan7
    on 9 March 2014

    This is a great story about two very different sisters

  12. Rumaitha12
    on 9 March 2014

    I really liked this book.

  13. bee100xxx
    on 8 March 2014

    Marty and Melissa could not have been more different, Marty loves Football and DIY and Melissa loves all things girly and pink.They have row after row until a disaster strucks and Marty realy does realize the Worst thing about her sister….

    5out of 5
  14. zippy123
    on 8 March 2014

    This is a great book which tells the differences of two sisters, one is a tomboy and the other is a girlie girl. and they don’t get along. great book to read.!!

  15. books2000
    on 8 March 2014

    its good

  16. wing4
    on 3 March 2014

    This book is brilliant and I highly recommend it for others with brothers or sisters. At the ebpnd it is a tiny bit sad but only a bit. I give it 5⭐it was great!

    5out of 5
  17. mahfuza
    on 1 October 2013

    i love this book its totally amazing yh so i have to read it again and again and i just love Jacqueline Wilson’s books.

    5out of 5
  18. Ellyxx
    on 22 August 2013


    5out of 5
  19. bouncybunny
    on 8 March 2013

    Anthor totaly ausom book by jaquline wilson I totaly loved this book I could but help read it once and then readit over again I mean that’s how good it was I read it twice in a row , this book is about 2 total different sisters who have to share a room with each other after having a room of there own I rember when my mum droped that bombshell

  20. xxChocolateBoxGirlxx
    on 8 March 2013

    I think that this book is awesome. I loved it.This book is about two sisters called Marty and Melissa.Marty is rather boyish and likes animals,football, and her converse trainers.She hates dresses. Melissa is all things pink, shes really girly and likes Justin Beiber. Basically they are complete opposites.They fight all the time.But then whilst fighting, one of the sisters gets hurt. Will her sister be there for her? Find out in The worst thing about my sister.5/5. <3

    5out of 5
  21. KarlMagic33
    on 7 March 2013

    Really Good!

  22. ellie-melay27
    on 7 March 2013

    really good book! i love jacqueline wilson a lot! she is one of my favourite authors. this book 5/5

  23. bugzy72
    on 7 March 2013

    its a good book

  24. lap312i
    on 6 March 2013


  25. samcharlie123
    on 5 March 2013

    Love this book! It’s about two totally different sisters, and how they get on. (and how they don’t!)

    5out of 5
  26. natashakrywald
    on 5 March 2013

    liked it

  27. tomboy55
    on 5 March 2013

    this book was very interesting and extremely funny. Marty and Melissa were great characters but i liked marty best

  28. lmdrld
    on 4 March 2013

    This book is about two sisters in their own different ways.

  29. DSherwin924
    on 23 February 2013

    This book is awwwwwwwwwwwwwwwwwwwwwwsome thank you Jacky.

  30. powerpush22
    on 19 February 2013

    I am like Marty so much.

  31. Something10
    on 19 February 2013

    I think this is a fantastic book one of the best books by my faverite author, Jacqueline wilson.

    5out of 5
  32. Crystal18
    on 25 November 2012

    It was heart breaking I even cried at the end for about ten minutes

  33. booklover-2004
    on 16 November 2012

    This book is wonderful it leaves you gripping on the edge of your seat. However at the end is sad but i dont think its a book you would cry about.

  34. wimpykid9
    on 13 November 2012

    I thought this book was quite funny though it is a bit sad when the sister gets hurt because i thought she was dead

  35. Lucky2468
    on 19 October 2012

    It is like me and my sis!but not the bit were she goes to hospital!!!!!