Quiet Please Murder(1942)
A public library at night is the setting for this fast-moving crime caper. George Sanders is a gentleman crook specializing in selling forgeries of rare books. In the company of phony policemen, Sanders enters the library unmolested and pilfers a priceless Shakespeare folio in order to expedite his operation. The criminal's girl friend/accomplice Gail Patrick is willing to go along with the crime until Sanders begins displaying a homicidal streak.