Number Theory
Benjamin Fine
The Real Numbers
John Stillwell
Intuitionistic Analysis
D. van Dalen
Topology, Algebra and Categories in Logic
Maria Manuel Clementino
Logical Methods
Roger Antonsen
My Book of Subtraction
Kumon Kodomo Kenkyujo
The Maths That Made Us
Michael Brooks
Mathematics For the Million
Lancelot Thomas Hogben
John Napier
Lynne Gladstone-Millar
The Calendar
David Ewing Duncan
Introducing Infinity
Brian Clegg
The Mathematicians' Library
Thomas K. Briggs
Is Maths Real?
Eugenia Cheng
The Art of Logic
Eugenia Cheng
The Language Lover's Puzzle Book
Alex Bellos
So You Think You've Got Problems?
Alex Bellos