The New York Times Delightfully Difficult Crosswords: 150 Hard Puzzles, Paperback/The New York Times

It's the best of both Finally a crossword omnibus that packs hours of puzzling fun into one portable package. And there's nothing like the thrill of solving a particualrly clever crossword * 150 challenging New York Times crosswords * Portable and perfect for solving on the go * Edited by the #1 man in American crosswords, Will Shortz