A plague on both your houses - Susanna Gregory

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

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Matthew Bartholomew, unorthodox but effective physician to Michaelhouse college in medieval Cambridge, is as worried as anyone about the pestilence that is ravaging Europe and seems to be approaching England. But he is distracted by the sudden and inexplicable death of the Master of Michaelhouse - a death the University authorities do not want investigated.

But Matt is determined to get to the truth, leading him into a tangle of lies and intrigue that cause him to question the innocence of his closest friends - and even his family - just as the Black Death finally arrives...

A Plague on Both Your Houses is the book that introduced Matthew Bartholomew to the world.