From the official Kindle blog:
We are excited to announce that The New York Times has released four handpicked volumes of their world famous crossword puzzles on Kindle. Considered by many to be the gold standard of crossword puzzles you can now enjoy these puzzles on Kindle–anytime, anywhere.
You can solve unassisted, or get help using the reveal one letter or entire answer functionality. The puzzles will also let you check for errors.
NY Times Crosswords Vol. 1: 30 World Famous Easy Puzzles
NY Times Crosswords Vol. 2: 90 World Famous Easy Puzzles
NY Times Crosswords Vol. 3: 30 World Famous Challenging Puzzles
NY Times Crosswords Vol. 4: 90 World Famous Challenging Puzzles
Still waiting for this stuff to be available in Canada. Having said that, I notice v. 12 of Powell’s epic is now available to Canadians in Kindle store.