I only half needed to go to the grocery store, which is across the parking lot from The Purple Cat used book store. The lure is usually irresistible, but I rarely get there before the 5:00 pm closing time. I alway enter looking only for a paperback copy of The Keep, by F. Paul Wilson. I always leave without it and, on average, three to five other volumes I didn't know I needed until I saw them. This time the haul was as follows:
, by Von Hardesty
Silent Victory: The U.S. Submarine War Against Japan, by Clay Blair, Jr. [UPDATE: Oops, only the 2nd of two volumes...]
The Outline of History, Volume I, by H.G. Wells, which I already had a copy of.
The Outline of History, Volume II, by H.G. Wells, which I did not. Now I own matched set, and a spare copy of Volume I.