A walk through history's most mind-boggling puzzles Ever since the Sphinx asked his legendary riddle of Oedipus, riddles, conundrums, and puzzles of all sizes h

The life and soul of any science are its problems. This is particularly true of mathematics, which, not referring to any physical reality, consists only of its

Cryptohistories is a collection of essays which provides a meeting ground for historians and cultural scholars analysing discussions of cryptic discourses in hi

An insightful and inspiring book on using "both/and" thinking to make more creative, flexible, and impactful decisions in a world of competing demands. Life is