An ancient volume of philosophical heresy provides a motive for murder in this haunting, lyrical novel of forensics, archeology, and history--the fourth in an acclaimed suspense series. What sort of book is worth a man's life? After a year away from working in the field, archaeologist Cormac Maguire and pathologist Nora Gavin are back in the bogs, investigating a ninth-century body found buried in the trunk of a car. They discover that the ancient corpse is not alone--pinned beneath it is the body of Benedict Kavanagh, missing for mere months and familiar to television viewers as a philosopher who enjoyed destroying his opponents in debate. Both men were viciously murdered, but centuries apart--so how did they end up buried together in the bog? While on the case, Cormac and Nora lodge at Killowen, a nearby artists' colony, organic farm, and sanctuary for eccentric souls. Digging deeper into the older crime, they become entangled in high-stakes intrigue encompassing Kavanagh's death while surrounded by suspects in his ghastly murder. It seems that everyone at Killowen has some secret to protect. Set in modern-day Ireland, The Book of Killowen reveals a new twist on the power of language--and on the eternal mysteries of good and evil.