From the Back Cover:
Four Fighting Fantasy episodes to be played as separate adventures or as stages in an epic adventure!
The Riddling Reaver is an opponent worthy of the most daring adventurers. His mind is inscrutable - but there is no doubt about the chaos he plans to unleash on the world. He must be stopped, despite the hazards of the task!
This book is a follow-up to Fighting Fantasy: the Introductory Role-playing Game. It contains instructions and scenarios so that you, as GamesMaster, can conjure up adventures for your friends, and send them on their most dangerous and puzzling mission yet - to confront the Riddling Reaver.