Even before I found Asimov and Heinlein and other books with space ships on the spine in the local library, I stole this paperback from my dad’s shelf around 1964. As you can see from the picture, it had an irresistible cover (yes, that’s the stolen copy).

For the most part, Bestor’s story has jaunting (teleportation through space) with no time travel, which is enough to cause plenty of excitement for Gully Foyle (aka Geoffrey Fourmyle) as he jaunts around the war-torn solar system, seeking revenge on various space merchants. But at one climactic point, he also manages a jaunt through time.
And then he was tumbling down, down, down the space-time lines, back into the dreadful pit of Now.

Variants

(1)
  1. The Stars My Destination by Alfred Bester, in Galaxy, October 1956 to January 1957.
  2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Alfred Bester