Fighting Fantasy: Forest of Doom by Steve Jackson (author) and Ian Livingstone (author)

The legendary Warhammer of Stonebridge lies lost and broken in the treacherous wilderness of Darkwood Forest. Without it, the Dwarves of Stonebridge are doomed…Only the foolhardy would enter the murky depths of Darkwood. But your quest will lead you into the very heart of the forest. Dare you take on the unknown perils of Darkwood, and survive the puzzles, traps and fearsome creatures that lie in wait for you? You alone must find the missing pieces of the Warhammer and save the Dwarves of Stonebridge before it is too late!