The New York Times Tough Crossword Puzzle Omnibus Volume 1: 200 Challenging Puzzles from The New York Times (New York Times Tough Crossword Puzzles)

The New York Times Ferocious Crosswords: 150 Hard Puzzles (New York Times Crossword Puzzles)

The New York Times Delightfully Difficult Crosswords: 150 Hard Puzzles

The New York Times Will Shortz's Xtreme Xwords: 75 Ultra-Challenging Puzzles for the Gutsy, Truly Bold and Fearless Solver

The New York Times Ultimate Crossword Omnibus: 1,001 Puzzles from The New York Times

The New York Times Supersized Book of Sunday Crosswords: 500 Puzzles (New York Times Crossword Puzzles)

The New York Times Super Saturday Crosswords: 50 Hard Puzzles from the Pages of The New York Times

The New York Times Sunday Crossword Omnibus Volume 7: 200 World-Famous Sunday Puzzles from the Pages of The New York Times

The New York Times Fascinatingly Fierce Crosswords: 150 Hard Puzzles (New York Times Crossword Puzzles)

The New York Times Sunday Crossword Omnibus Volume 8: 200 World-Famous Sunday Puzzles from the Pages of The New York Times (New York Times Sunday Crosswords Omnibus)

The New York Times Best of Saturday Crosswords: 75 of Your Favorite Sneaky Saturday Puzzles from The New York Times