books by subject
Mathematical Logic
Journey to the Edge of Reason: The Life of Kurt Goedel
Reflections on Kurt Goedel
There's Something About Goedel: The Complete Guide to the Incompleteness Theorem
Naive Set Theory
The Times Su Doku Book 10: 150 challenging puzzles from The Times (The Times Su Doku)
Bridge Secrets: Don't miss a trick (Collins Little Books)
Creative Puzzles of the World
Cambridge IGCSE (TM) Additional Maths Student's Book (Collins Cambridge IGCSE (TM))
The Times Fiendish Su Doku Book 3: 200 challenging Su Doku puzzles (The Times Fiendish Su Doku Puzzle Books)
Sudoku Puzzle Book for Adults: 300 Large Print Sudoku Puzzles | Easy to Hard
The Times Quick Crossword Book 12: 80 world-famous crossword puzzles from The Times2 (The Times Crosswords)
Logic for Mathematicians
The Music of the Primes: Why an Unsolved Problem in Mathematics Matters
Logic: An Introductory Course
Introduction to Network Security
Proofs: A Long-Form Mathematics Textbook (The Long-Form Math Textbook Series)
The Times Killer Su Doku 2: 100 challenging puzzles from The Times (The Times Su Doku)
Maths - Problem Solving & Reasoning Age 7-9 (Letts Wild About)
Elementary Applied Symbolic Logic
Getting the Facts
Logic for Mathematicians
Logic: A Very Short Introduction
An Introduction to Formal Logic
At Sixes and Sevens: How to Understand Numbers and Make Maths Easy
Calculus Made Easy: 2020 New Edition
Computational Logic and Human Thinking: How to be Artificially Intelligent
The Man Who Loved Only Numbers: The Story of Paul Erdos and the Search for Mathematical Truth: The Story of Paul Erdös and the Search for Mathematical Truth
Numbers: 10 Things You Should Know
Taking Sudoku Seriously: The Math Behind the World's Most Popular Pencil Puzzle