The Hills of Home

Assignment's End

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

Ray Cummings: The Flame Breathers

Pet Farm

Acid Bath

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

Crypt-City of the Deathless One

To Remember Charlie By

Asteroid of Fear

Assignment on Venus

Lost Sci-Fi Books 1 thru 10

The Testaments

Nine Sci-fi Stories (Unabridged): optional

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

Star Ship (Unabridged)

The Chapter Ends

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

Poul Anderson: Snowball