The Library Policeman is a novella written by Stephen King. It was first published in 1990.
Plot[]
The Library Policeman tells of Sam Peebles and his battle against an age-old fear.
Peebles is asked to give a speech to his local Rotary Club. An office assistant named Naomi Higgins directs him to the public library to check out books that might help with his speechwriting. At the library, he receives a library card and assistance in finding books from an elderly librarian, Ardelia Lortz. Having noticed a series of disturbing posters in the children's section, including one featuring a frightening "Library Policeman" character, he discusses their appropriateness with Ardelia. After being rebuffed by her, Sam checks out the books with the warning that they must be returned on time or else "I'll have to send the Library Policeman after you."
The speech is a success, but Naomi informs Sam that Ardelia Lortz has been dead for many years. Ardelia, as a young woman, committed suicide in 1960 after murdering two children and a local deputy sheriff. The books are accidentally destroyed and a menacing Library Policeman terrorizes Sam at his house. Through Naomi, Sam meets Dave "Dirty Dave" Duncan, an alcoholic former sign painter and a former lover of Ardelia's. From Dave's recollections, Sam discovers that Ardelia is not a person but a being which feeds on fear and that Duncan was a sometimes unwilling companion/conspirator in helping her feed from the fear of children. Dave believes Ardelia is seeking revenge and a new host. While the trio attempt to stop Ardelia's return, Sam recalls a repressed memory: a man claiming to be a "Library Policeman" raped and threatened Sam when he was a young child in St. Louis. However, the new Library Policeman is not just a recreation of the man from Sam's past, but also an embodiment of Ardelia, who wants Sam as her new host.
Dave dies defending Sam and Naomi from Ardelia. Sam and Naomi defeat the Library Policeman/Ardelia, only to discover that Ardelia has already attached to Naomi in the form of a blistery growth, "covered in a spiderweb skein of crisscrossing white threads ... a lump of pinkish jelly that throbbed and pulsed with the beat of her heart." Sam removes the creature from Naomi's neck and destroys it under the wheels of a passing train.