The Thirteenth Apostle (2020) by Jamie Probin

Last time, I reviewed "The Episode of the Nine Monets" (2020) by Jamie Probin, a mathematician, who has written a short series of impossible crime and locked room mysteries about a mathematician-detective, Dr. Samuel Harris – who acts as a special consultant to Scotland Yard and Sûreté. "The Episode of the Nine Monets" and The Thirteenth Apostle (2020) form the "Le Fantôme Saga" with the former being a prequel to the latter.Le Fantôme is the classically-styled, phantom thief who has terrorized the museums and private collectors of France and Britain for years. Only real opposition came from Dr. Harris and Henry Toussante, Patrick Larson and Alain Noble of the Sûreté. The last three starred in "The Episode of the Nine Monets" as they try to figure out how their nemesis spirited away a valuable painting from a locked townhouse. They triumph in cracking the locked room problem and get back the stolen painting, but Le Fantôme is still on the loose and more popular than ever. The…