Oxford 1272.

William Falconer’s former lover, Lady Ann Segrim, is found poisoned in her garden.

Evidence points to Falconer, and now he’s on trial for murder. His friends don’t believe it, yet someone is determined to see him hang.

But this is not a simple crime of passion.

Ann had been slowly poisoned for a number of days before her fatal dose. At the time she was investigating the suspicious death of Sister Marie at the local nunnery.

Then the nun who discovered Sister Marie’s body is found hanged. Only someone close to the nuns could have done this.

Time is running out. It’s up to local constable, Peter Bullock, and Falconer’s student, Thomas Symon to use Falconer’s famed methods of reason and logic to prove his innocence. And find the real killer.

But when the truth comes to light, it’s more shocking than Falconer could have foreseen . . .

Fans of C.J. Sansom, Ellis Peters, S.J. Parris, Paul Doherty, Rory Clements and S.W. Perry will devour this gripping medieval mystery series.