Dr. Stanley Highstreet returns in four new exciting mysteries. In Murder at the Mystery Grove, shy physicist and paranormal investigator Dr. Stanley Highstreet and his assistant PI Zetrower Hill endeavor to unravel the secrets behind the strange gravitational anomalies of the famous tourist attraction. Two seemingly unrelated deaths turn out to be more than just freak accidents.Locked room mysteries are not supposed to happen in real life. Dr. Highstreet finds himself trying to solve one in Mostly Ravens. Was Rachel Fournier's death a suicide or a clever murder?A mysterious and possibly dangerous cult called The Tribe has lost its leader in Death of a Guru. Dr. Highstreet receives a desperate email from an old friend. The group might be caught in the fevered millennium fears of Guru Dimitri Sokol.The famed island penitentiary has once again become a prison after a park ranger has been found strangled in Saints of Alcatraz. Dr. Highstreet and Zet Hill are on the island simply to investigate a psychic who has been giving unofficial ghost tours. To get off the island in time to make a speaking engagement, Dr. Highstreet reluctantly agrees to solve the murder case.