It's puzzle heaven for crossword devotees who are short on time but looking for ways to keep their brains and their pencils sharp. Created by Matt Gaffney, author of seven books of crossword puzzles, four books of variety puzzles, the narrative Gridlock: Crossword Puzzles and the Mad Geniuses Who Create Them and crossword contributor to the New York Times, Wall Street Journal, Washington Post and others. Each puzzle book features 125 ingeniously themed crosswords that will appeal to both the adept solver and novices. Designed to be solved in 20 minutes or less, the While-You-Wait Crosswords are perfect while waiting in a doctor's office, a motor vehicle department line, or for the polls to open.