I love books. LOVE, LOVE, LOVE books. I have been collecting photography books for at least 30 years. Sometimes I have too many, and sell a bunch of them, only to regret it later. But I tend to keep the goodies, and I often buy two copies (or more) of a book I expect will become valuable one day (SUMO by Helmut Newton sold for $1500 when printed, $15,000 today).