04 - Secret of the Silver Car by Wyndham Martyn

Anthony Trent, a former master criminal never caught in the US, now faces the threat of his secret being revealed after a life-altering event during World War I. Buried alive in the trenches alongside an English soldier, he had no choice but to reveal his secret identity, believing they were on the brink of death. Miraculously rescued, the two were separated. Now recovered, Trent is consumed with finding the English soldier to express gratitude for saving his life and to discover if his secret is safe. His quest is fraught with thrilling adventures, espionage, blackmail, and unexpected love. Will Trent find his savior in time or will his past come back to haunt him?