Grailquest
Book series
GrailQuest is a series of gamebooks by J. H. Brennan. The books are illustrated by John Higgins. The stories follow the adventures of a young hero named Pip, who is often called upon by Merlin to right wrongs and save the realm from evil. Wikipedia
Author: James Herbert Brennan
Books: The Castle of Darkness, The Den of Dragons, The Gateway of Doom, and more
Illustrator: John Higgins