A schoolgirl disappears, some dangerous chemicals are stolen and a couple of teachers are murdered - and an amazing secret is uncovered that could be a powerful motive for murder.

The old murder looked like a very cold case for Dalziel and Pascoe - until the new murders started to happen.

A biblio mystery set in a world-class library amid some very peculiar talk about the perfect murder.

Murder among the quarrelsome residents at Presteignton Spa in this Golden Age classic.