When Oxford undergraduate, Patrick Cartwright, takes a summer job in a Venetian palace to coach a fourteen year-old boy and discovers that there is a beautiful older sister he must have thought that things could not be better. However, there are satanic undertones and Patrick seeks assistance from his old friend, Simon Baines as things get steadily worse. Marston Baines gets involved as he suspects that there is a connection with a murder in a Cotswold village church. The action takes place in Venice and Rome as they track down and rescue a kidnap victim.

Heinemann (1965)	Full Text
Childrens Book Club (1966)	Full Text	Library copy available
Heinemann (1976)	Full Text