Half a Crown

by Jo Walton

The book is a thriller set inside an alternate history in which the United Kingdom made peace with Adolf Hitler, and the United States did not become involved in World War II. The British government has become fascist and authoritarian. Peter Carmichael, formerly a police inspector at Scotland Yard, is now head of the secret police, called "The Watch". He must deal with political intrigue by those jealous of his position and must safeguard his teenage ward while he keeps secret his illicit activities helping Jews and dissidents who wish to flee the country.