mahmud

"How To Solve It" George Polya. Heurists and problem solving skills, by a great mathematician.

Set Theory is the building blocks of mathematics, and Halmos is a first-rate mathematician and teacher. Excellent recommendation Paul.

The Story of Civilization; 11 volumes of pure joy.

Run, don't walk, and get "An Introduction to Mathematical Reasoning"by Peter Eccles.

"An Introduction to Mathematical Reasoning" by Peter J Eccels. Teaches the vocabulary of mathematics, just the basics you need to think like a mathematician, not a mathematics user like most science texts.

Muqadimat Ibn Khaldun. History, Sociology, Political Science, Scientific Empiricism, Theology, Superstition, Gossip, Leadership, Trivia .. it's everything.