“One of the Greatest Puzzles of All Time”
Matthew J. Costello, author
The Greatest Puzzles of All Time (Prentice Hall)

Invented by Don in 1977, the Parking Lot Puzzle has received international acclaim as a Top 5 Apple app, award-winning board game, best-selling video game, and in dozens of Web sites and hundreds of newspapers worldwide.

Considered one of the greatest puzzles in history, the Parking Lot Puzzle has inspired dozens of imitations, and received more than twenty awards from educators, publishers and parents’ associations.