Adult book. Was in paperback format in mid to late 70s. Book was about one of the 4 arch -demons (as in demons from Hell) who became known to members of the Jewish race. This particular demon held special hatred for the Jewish people and had been an SS officer during WW2 era.
They were able to capture the demon (who was in human form) by someone wearing the vest of Abraham. They imprisoned him in the crypt in China which is surrounded by the Terracotta warriors who actually were guarding the tomb to ensure none came close to open it. One follower of the demon tried and the terracotta warrior killed him with a bow. The crypt was actually a prison built specifically for him. Another prison was built for one of the other 3 arch-demons under the great salt lake in Utah prior to the prison being submerged thousands of years ago.