I didn't realize I'm not the only one who leaves books behind instead of bringing them home. I travel with novels or other books I know I won't want to reread or keep for research and leave them wherever I finish them. I'm fortunate in that one of my editing jobs is for a magazine that reviews several hundred books a year, and I get about 3-4x that many review products. Occasionally I buy used paperbacks at the library or really cheap ones at the bargain bookstores.