Scorpion Swamp is one of my favorite Fighting Fantasy books. Its format is quite different from all the others released before it, since those progressed in a linear fashion and this one offered non-linear gameplay.
In Scorpion Swamp you actually can go back from where you came from (and have to do so to actually finish the book).
Other major aspect of this book is that there’s not only one quest to finish, but at the start of the book you’re allowed to choose one from three quests. All three are pretty easy to finish once you’ve made a map of the swamp and the book actually encourages you to do so.