- E-bookCalculus Made EasySilvanus P. Thompson
- E-bookThe Whys of a Philosophical ScrivenerMartin Gardner
- E-bookMagical MathematicsPersi Diaconis
- E-bookUndiluted Hocus-PocusMartin Gardner
- E-bookMy Best Mathematical and Logic PuzzlesMartin Gardner
- E-bookCodes, Ciphers and Secret WritingMartin Gardner
- E-bookRelativity Simply ExplainedMartin Gardner
- E-bookMathematics, Magic and MysteryMartin Gardner
- E-bookMental MagicMartin Gardner
- E-bookEntertaining Science Experiments with Everyday ObjectsMartin Gardner
- E-bookMind-Boggling Word PuzzlesMartin Gardner
- E-bookMartin Gardner's Science MagicMartin Gardner
- E-book100 Geometric GamesPierre Berloquin
- E-bookMartin Gardner's Table MagicMartin Gardner
- E-book100 Numerical GamesPierre Berloquin
- E-bookOne Hundred Problems in Elementary MathematicsHugo Steinhaus
- E-bookThe Coloured LandsG. K. Chesterton