The Seven Serpents (Steve Jackson's Sorcery! Fighting Fantasy, No. 13)

As your quest brings you ever closer to the Crown of Kings, seven deadly serpents race to the fortress of Mampang to warn the Archimage of the impending threat...Your task is to destroy the serpents and reach the Archimage's fortress. As in previous books, you choose between playing a Warrior or a Sorcerer, and must use all the information you have gained throughout your quest, casting spells correctly and avoiding the deadliest of traps.