Objet D'art. Memorabilia Trilogy, #2

Sean, an ex-police officer turned pawn shop owner, sits parked at a gas station with photographic evidence of time travel in his hands. Someone on the other side of the station is approaching his car. The identity of the stranger shocks him more than the content of the photographs. Keeping a step ahead of the Secret Service and the local police, Sean finds himself stranded in Paris in 1944, as the Germans are retreating from the city.
An emotionless killer named Sands that Sean faced before needs one more priceless work of art to retire comfortably. He has his eye on a Rembrandt that disappeared from Paris during World War II and he'll kill anyone that gets in his way. Sean must race against Sands to find the Rembrandt first. The search lands Sean in the miles of tunnels under Paris without a map or a flashlight. Even with the help of some unlikely allies, Sean may not make it out of 1944 Paris alive.