Alan Turing's Puzzle Machine: 100 Number Puzzles

(Part of Alan Turing's Puzzle Machine)

Emily Stead and Lucy Doncaster

Trade Paperback

$13.99

Alan Turing's Puzzle Machine: 100 Brain Teasers

(Part of Alan Turing's Puzzle Machine)

Emily Stead and Lucy Doncaster

Trade Paperback

$13.99