Philip K. Dick 
The Skull 

In The Skull, a convict is offered his freedom if he agrees to travel back in time and kill someone. He learns that the assasination target was the founder of a religious sect that grew in strength and influence from its inception in 1960. Carrying his target’s skull so he can identify the religious leader, the convict comes to learn a terrible secret about why he was chosen to find its owner.

About the author

Philip K. Dick (1928-1982) – was a prolific novelist, essayist and short story writer – having published approximately 44 novels and 121 short stories. His works have been turned into numerous popular films, including Total Recall, Minority Report, and The Adjustment Bureau. He won a Hugo Award in 1963 for his novel The Man in the High Castle and has been named as one of the hundred greatest English-language writers by Time magazine.