Pilgrim
An omnibus edition of Pyramids and After the Fact.
Who is Pilgrim? Tom Scheffler and Jerry Flint are going to find out the hard way, because the mysterious Pilgrim is going to have them fighting for their lives centuries, millennia before they were born. Pilgrim is the rogue time traveler trying to change the course of history for his own ends. And even if the two hapless adventurers survive Pilgrim's deadly game, they have no assurance that they will ever see their own timeline again.
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Fred Saberhagen
Fred Thomas Saberhagen (1930–2007) was a Chicago-born American science fiction and fantasy fiction author most famous for his Berserker series of science fiction stories.
He also wrote a series of vampire novels in which the vampires (including the famous Dracula) are the protagonists, and a series of post-apocalyptic mytho-magical novels beginning with his popular Empire of the East and continuing through a long series of Swords and Lost Swords novels. Saberhagen died of cancer, in Albuquerque, New Mexico.
Pilgrim, the Flying Dutchman of Time
Pilgrim, the Flying Dutchman of Time consists of two primary books, and includes one additional book that complement the series but is not considered mandatory reads. The current recommended reading order for the series is provided below.

