The Time Traders

The Time Traders II: The Defiant Agents and Key Out of Time

Catseye

Caliban's War: Book 2 of the Expanse (now a Prime Original series)

Andre Norton: Voodoo Planet: A duel of two cosmic magicians - a horrible death for the loser

Darkness and Dawn

Clifford Simak: Hellhounds of the Cosmos

Leviathan Wakes: Book 1 of the Expanse (now a Prime Original series)

S. P. Meek: GIANTS ON THE EARTH

Jack Williamson: Salvage in Space: To Thad Allen, meteor miner, comes the dangerous bonanza of a derelict rocket-flier manned by death invisible.

Star Flight

The Testaments

Dark Companion

Nemesis Games: Book 5 of the Expanse (now a Prime Original series)

Crosstime

Abaddon's Gate: Book 3 of the Expanse (now a Prime Original series)

Masks of the Outcasts