ChapterPals: Reading, together
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On Numbers and Games
The Book of Numbers
Winning Ways for Your Mathematical Plays: Games in Particular (Vol. 2)
Winning Ways for Your Mathematical Plays: Volume 1
On Quaternions and Octonions
Triangle Book
Winning Ways for Your Mathematical Plays, Volume 2
Sphere packings, lattices, and groups
Atlas of Finite Groups Maximal Subgroups and Ordinary Characters for Simple Groups
The Sensual (Quadratic) Form