Note: This list only includes books for which I have reviews. There are surely other books I've read in the past that deserve to be on this list, and I'll add them if and when I re-read them. Also, I'm listing them in order based on the ratings I gave them at the time that I read them, which may not be a perfectly accurate representation of the order in which I actually liked them.

The Hitchhiker's Guide to the Galaxy (series)
Foundation (series)
The Brothers Karamazov
Mrs. Frisby and the Rats of NIMH
Waiting for the Galactic Bus
His Dark Materials (series)
Night
Doomsday Book
Luck in the Shadows
Catch-22
You're Never Weird on the Internet (Almost)
The Devil's Arithmetic
A Christmas Carol
The Time Traveler's Wife
Nineteen Eighty-Four
Watership Down
Little Women
The Secret History
To Kill a Mockingbird
Stranger in a Strange Land
A Tale of Two Cities
The Handmaid's Tale
The Time Quartet (series)
Frankenstein
The Space Trilogy (series)
Starship Troopers