I suspect maths in primary school would be greeted with far more enthusiasm if students had Ian Stewart as a teacher. Any man who can explain electromagnetism, gravity and atomic nuclear forces in terms of a piggy fridge magnet and a smashed kitchen plate is, surely, a communicator to be reckoned with.
Longitude was first published in 1996, occupying a substantial portion of many a Waterstones table around Christmas-time. The book has endorsements from Patrick O'Brien and Neil Armstrong, and a blurb that cheerfully describes the search for longitude as a "true-life thriller".
'This book starts with the story of Larry Walters, who decided to try flying a garden chair with some fifty helium weather balloons attached. Larry didn't do the maths, and ended up at 16,000 feet! Michael de Smith has written a book for all the Larrys who need or ought to do some mathematical analysis of a problem before setting out.