The fourth DI Don Packham and DC Frank Mitchell mystery.
There's a body in the library.
The Bath Street public library in Cowden, London, that is. The borough council wants to close it as part of a "rationalization" package. So one autumn night, militant library-lovers enter the building and begin unfurling their banners and bedrolls. The mood is full of hope and solidarity-at least, until a garroted corpse is found sitting in the librarian's office.