I can recommend the following: John Derbyshire's Unknown Quantity - A real and imaginary history of algebra David Well's The Penguin Dictionary of Curious and

I can recommend the following: John Derbyshire's Unknown Quantity - A real and imaginary history of algebra David Well's The Penguin Dictionary of Curious and Interesting Numbers William Dunham's The Mathematical Universe - An Alphabetical Journey Through the Great Proofs, Problems and Personalities Alex Bello's Alex's Adventures in The Numberland - Dispatches from the wonderful world of mathematics