The Mathemagician and Pied Puzzler The Mathemagician and Pied Puzzler
1999
Homage to a Pied Puzzler Homage to a Pied Puzzler
2009
Mathematical Wizardry for a Gardner Mathematical Wizardry for a Gardner
2009
Puzzlers' Tribute Puzzlers' Tribute
2001
A Lifetime of Puzzles A Lifetime of Puzzles
2008