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

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

Masters of Space: A Rip-Roaring Space Epic

The Testaments: WINNER OF THE BOOKER PRIZE 2019

The Galaxy Primes

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

E.E."Doc" Smith & Lee Garby: The Skylark of Space

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

The Vortex Blaster Makes War (Unabridged): optional

Cibola Burn: Book 4 of the Expanse (now a Prime Original series)

Tedric

Babylon's Ashes: Book 6 of the Expanse (now a Prime Original series)

The Skylark of Valeron (Unabridged): optional

Storm Cloud on Deka (Unabridged): optional

Galactic Patrol (Unabridged): optional