Skyfall is a series of Advanced Fantasy gamebooks. It is set on the lush beautiful planet of Skyfall. Humans have only settled small areas.
The series is designed to allow the player to reason logically from the information given to the player, and make choices that give a greater chance of success.
The game system of the book uses no dice, instead it is based on coin tosses. The player will be asked to toss a number of coins, and count the number of heads, number of tails, or subtract one from the other. Sometimes the coin toss result is added or subtracted from a fixed number of one of the characters three attributes Expertise, Vitality and Fortune.