Sharon Penman - The Queen's Man - a medieval mystery

Epiphany, 1193. Eleanor of Aquitaine sits upon England's throne. Her beloved son Richard Lionheart is missing, presumed dead - and the court whispers that her younger son, John, is plotting to seize the crown. Meanwhile, on the snowy highroad from Winchester, a destitute young man falls heir to a blood stained letter, pressed into his hand by a dying man.
The missive becomes Justin de Quincy's passport into the queen's confidence - and into the heart of danger, as he pursues a cunning murderer and jousts with secret traitors in Eleanor's court of intrigue and mystery . .

Penguin, 306pp.