Gripping Historical Mysteries by Lawrence J. Epstein

This mystery thriller begins in 1938. The Nazis know that Winston Churchill is their greatest enemy. They therefore send two trained agents to London—but not to kill him. They must figure out how to eliminate his power while keeping him alive.
Meanwhile, two Scotland Yard detectives are assigned to solve a murder. Their investigation leads them to the center of a struggle in British life between those who wish to make a deal with Hitler and those who wish to fight him.
Clues about the murder lead the detectives into the twisted Nazi plot, the valiant effort to rescue children from the Nazis, and a wartime romance. This work of historical fiction is filled with glimpses of life in London just before and just after the outbreak of the Second World War.