The day after an alcoholic college professor who killed a young girl in a drunken accident is released from prison and returns home, he is run over by his own car.
Lewis' reputation is jeopardized when the very first case that he solved as a DI is reopened for appeal and new murders are committed with the original weapon.
While Benison College is being renovated, the desiccated body of a student who disappeared 15 years earlier is found in an attic and linked to Seager's murder.
A scholar obsessed with Lewis Carroll's poem "The Hunting of the Snark" is found buried in the botanical gardens frequented by the author during his life.
When a retired MI5 official writes her best-selling memoirs, a chapter in her book about an unsolved IRA cold case causes consternation and ultimately several murders.