Gareth Roberts

The Doctor's old friend and fellow Time Lord Professor Chronotis has retired to Cambridge University - where nobody will notice if he lives for centuries. But now he needs help from the Doctor, Romana and K-9.

When a horrific and inexplicable death occurs at Space World, a new theme park on Hampstead Heath, UNIT is called in to investigate. The Doctor is highly suspicious. Just who controls the Parakon Corporation, the shadowy organisation behind the running of the park? What is "Experienced Reality" and what are the limits of its awesome powers?

In this accessible and authoritative study, Gareth Roberts provides an introduction to the history, concepts, terms and presuppositions of western European alchemy, as well as discussing the works of individual alchemists and the characteristically metaphorical and paradoxical languages they employed. With a wealth of illustrations in colour and black and white, drawn from he outstanding collections of alchemical manuscripts and printed books in The British Library, and an illustrated glossary of alchemical terms, The Mirror of Alchemy is a fascinating survey of the subject for anyone interested in medieval and Renaissance thought and culture.