First, you have to identify the keepers. 

A book is safe in my home if it meets any of the following criteria:

• a) I like it.
• b) I like its author.
• c) I intend to like it when I get around to reading it.
• d) It’s a classic.
• e) It has sentimental value.
• f) It’s autographed (e.g., my long-dead grandfather’s personalized copy of J. Edgar Hoover’s Masters of Deceit: The Story of Communism in America and How to Fight It).
• g) Its premise amuses me (I Was Jacqueline Kennedy’s Dressmaker).