The Kinglsayer, published in 1949 in Science-Adventure

“The Kingslayer”
by L. Ron Hubbard

Publication date: November 1949

Original publication: Two Complete Science-Adventure Books

Genre: Science Fiction

Story description: A brilliant young engineer is kidnapped by a member of a revolutionary group, told of the existence of “The Arbiter,” the person responsible for all of the world’s evil, and sent on a mission to find and destroy him. Discovery of the true identity of the Arbiter, and of the real purpose of the engineer’s mission—and destiny—provides an ending of startling dimensions.

Currently available in the audiobook The Kingslayer.