Exercise with Three Unknowns

Travelling on the 4.50 from Paddington, Mrs McGillicuddy witnesses a murder on a passing train - but where is the body?

When a priceless crown is stolen during a benefit gala held by the Lawrenceton library, Aurora and the Real Murders Club must investigate who would kill to get their hands on it.

When an old friend of New York Sentinel Crosswords editor Tess Harper is found murdered on the very day her puzzle includes his proposal of marriage, Tess unofficially teams up with Detective Logan O’Connor to find the killer.

Archaeologist Emma Fielding is hired to consult on the acquisition of a castle-like estate that local legend states is cursed. But she finds herself in the middle of a murder case after discovering the body of the archaeologist she was hired to shadow in a secret chamber in the bowels of the huge building. Assisted by her friend, FBI special agent Jim Conner, Fielding must sift through clues and a long list of suspects, each of whom has their own reason for wanting the man dead, to determine who is the killer.