
Provides an overview of Mathematics and the text includes several fascinating mathematical conundrums.
Recently finished: 1089 and All That (finished today), The Life-Changing Magic of Tidying Up, Gibson's The Peripheral
I've bought copies for friends and family whose maths backgrounds range from school to degree level and they've all enjoyed it.
It's not a textbook, more a conversational account of a few topics the author has found interesting through his life from a young boy to an Oxford don. It's very readable and the author's delight in maths and problem solving shine through
Also "Alice and Numberland", Baylis and Haggarty; and "The Foundations of Mathematics", Stewart and Tall. These are both pitched somewhere between high school and university level and bridge the gap well.