Nonfiction
A City on Mars: Can We Settle Space, Should We Settle Space, and Have We Really Thought This Through? by Kelly and Zach Weinersmith
Them by Ben Sasse
Unoffendable; Blessed Are the Misfits; The Truth About Us; and The Men We Need by Brant Hansen
American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer by Kai Bird and Martin J. Sherwin
The Elements and Molecules by Theodore Gray
The Great Tradition: Classic Readings on What It Means to Be an Educated Human Being edited by Richard Gamble The Bible by various authors and God
Killers of the Flower Moon by David Grann
What If? and What If? 2 by Randall Munroe
The Hiding Place by Corrie Ten Boom
Fiction
The Hobbit; The Lord of the Rings; and The Children of Húrin by J.R.R. Tolkien
Dune and Dune: Messiah by Frank Herbert
2001: A Space Odyssey by Arthur C. Clarke (written in conjunction with the film)
The Martian and Project Hail Mary by Andy Weir
The Great Divorce by C.S. Lewis
Animal Farm and 1984 by George Orwell
The Fault in Our Stars by John Green
The Phantom Tollbooth by Norton Juster
Alas, Babylon by Pat Frank
The Mountains of Madness by H.P. Lovecraft
The Lorax by Dr. Seuss
The Lion, the Witch, and the Wardrobe; The Magician's Nephew; and The Last Battle by C.S. Lewis
The Visitation by Frank Peretti