Foundation, when it was just a trilogy, and everything else by Asimov up til then. Robots!
Lord of the Rings including the appendices. Read Hobbit + LotT aloud to the kids.
The Urantia papers, several times. With comprehension. mostly.
Moby Dick gets more fun with each re-read.
The Collected AoS ONTs Comments. In the original Gaelic!
So many words, so few years.