Angels in the Gloom (World War I Series, Novel 3) : An unforgettable novel of war, espionage and secrets by Anne Perry

It?_Ts March 1916, and Joseph Reavley is on sick leave and finding recovery slow and hard. His sister Hannah is caring for him at home, and it?_Ts a delight to them both when Shanley Corcoran, an old friend, comes to visit. Corcoran confides in Joseph that he?_Ts come very close to completing an invention that will paralyse the deadly German U-boats. Soon afterwards, however, the leading scientist on that project is found murdered, and it?_Ts clear that someone has been betraying secrets to the enemy. Joseph?_Ts brother Matthew, of the S.I.S., comes down to investigate, and together the two men embark on a search that will solve the crime and lead them to the spy.
Binding: Paperback / softback