If that gorgeously photographed hardcover is doing little more than keeping your bud vase and votives company, you may want to Google it to see how much a used copy is selling for. Many home design, fashion and jewelry books really hold their value—and in some cases, can be worth more than you originally paid for them. Three highly sought-after titles are Christie's Auction Collection Yves Saint Laurent et Pierre Bergé
, which sells for about $399; Emilio Pucci
by Vanessa Friedman and Alessandra Arezzi Boza, for about $45; and Vogue Living: Houses, Gardens, People
by Hamish Bowles and Calvin Klein, which brings in about $34, says Brent.