Biblical allusions make great book titles too:

East of Eden by John Steinbeck
- Genesis 4:16
   
Absalom, Absalom! By William Faulkner
- II Samuel 19:4 (not a direct quote.)

Stranger in a Strange Land by Robert Heinlein
- Exodus 2:22

Lord of the Flies by William Golding
- II Kings 1:1-6,16, also Luke 11:15-19
("Lord of the Flies" is the translation of the name "Baalzebub".)

The Sun Also Rises by Ernest Hemingway
- Ecclesiastes 1:5

Kent