Ross Honsberger
1929 – 2016
Ross Honsberger was a Canadian mathematician and author on recreational mathematics. *--Wikipedia*
Mathematical delights
Mathematical diamonds
Ingenuity in mathematics
More mathematical morsels
Episodes in nineteenth and twentieth century Euclidean geometry
From Erdös to Kiev
Gitter - Reste - Würfel
In Pólya's footsteps
Ingenuity in mathematics
Ingenuity in Mathematics (New Mathematical Library)
Joyaux mathematiques
Mathematical Chestnuts from around the World (Dolciani Mathematical Expositions)