The Association for Games & Puzzles International - A new mechanical puzzles book was recently published by AGPI member Jerry Slocum along with Dic Sonneveld. Called Romano-Celtic Mask Puzzle Padlocks, the book
Mechanical Puzzle Book Collection. Jerry Slocum,Jack Botermans, Puzzles | #410279294
IU Bloomington on Twitter: "In town for #GenCon18? Consider a #gencon side-trip to see the world's largest collection of mechanical #puzzles at the @IULillyLibrary's Slocum Puzzle Room! Home to more than 30,000
How One Collector Amassed Over 35,000 Puzzles – Art of Play
Image Collections Online - The Jerry Slocum Mechanical Puzzle Collection