(Hardback)

This is a biography of 'England's greatest medieval scientist, a man who solved major practical and theoretical problems to build an extraordinary and pioneering astronomical and astrological clock'.

(Paperback)

Clocks became common in late medieval Europe and the measurement of time began to rule everyday life. This work is a biography of England's greatest medieval scientist, a man who solved major practical and theoretical problems to build an extraordinary and pioneering astronomical and astrological clock.