If you don't know what gamebooks are, I really don't feel like explaining it. Suffice it to say that it's a sort of solo roleplaying adventure; you take your character through the book, fighting monsters (with dice), accumulating treasure and trying to defeat the final boss. Daggers of Darkness is #35 in the Fighting Fantasy series, which means that the authors had a lot of experience writing these things before this one--and it shows. The book is set in Kazan, a pastiche of East/Central Asia as far as I can tell. There's an intricate (yet efficiently told) backstory which justifies roaming the lands of six different clans, facing challenges and mazes to find magic medallions, all while dodging assassins and evil wizards. There are many paths through the book and many ways to replay it. There are also a lot of details that bring the setting to life, like how one clan is symbolized by a horse and another by a bull, and those animals show up in their architecture, signposts etc.. Also, the book has the best cover ever.