For the twentieth anniversary of the Matthew Bartholomew series, Sphere reissued the books with beautiful new illustrated covers.

In 1350, the people of Cambridge are struggling to overcome the effects of the Black Death - and with a high mortality rate among priests and monks, the townsfolk are vulnerable to sinister cults that have sprung up.

At Michaelhouse, Matthew Bartholomew is training new physicians when the body of a friar is found in the massive chest that the University uses to store precious documents. While investigating, Bartholomew stumbles across a derelict church being used as a meeting place for the mysterious sect he believes is at the heart of a web of blackmail and deceit - with intention to overthrow the established religion.