Browne, Douglas G. Death in Seven Volumes (London: MacDonald, 1958) 192 p.

Roger Gournay is the Librarian of the London Library. When he discovers that some obscure philosophy books have been replaced with non-library copies he consults the police and an investigation is launched. It turns out that someone has inserted a coded message into the library set. One of those mysterious chases through the stacks occurs on p. 120-28.