Island of the Lizard King is a single-player adventure gamebook written by Ian Livingstone, and illustrated by Alan Langford. Originally published by Puffin Books in 1984, the title is the seventh gamebook in the Fighting Fantasy series. It was later republished by Wizard Books in 2002.
Kidnapped by a vicious race of Lizard Men from Fire Island, the young men of Oyster Bay face a grim future of slavery, starvation and a lingering death. Their new master is the mad and dangerous Lizard King, who holds sway over his land of mutants by the eerie powers of black magic and voodoo. YOU are the only one who can hope to rescue the suffering prisoners, but do you have the courage to risk this dangerous mission?
The player takes the role of an adventurer on a quest to find and stop the Lizard King and free the human slaves captured by his army. As the adventurer, the player must traverse Fire Island, battling Lizard Men and various other monsters. The player must also find and utilize information regarding the Lizard King's weakness that will be required during the final confrontation.
Marcus L. Rowland reviewed Island of the Lizard King for the May 1984 issue of White Dwarf, rating the title 8 out of a possible 10. Rowland claimed that Island of the Lizard King "seemed to contain more monsters and less traps than others in the series, and most of the traps seemed to be fair", concluding that this was "probably the toughest adventure of this series, since few options allow the adventurer to avoid a fight".