The Greenville County Library in South Carolina pulled two copies of the anthology from its shelves after Carrie Gaske filed an official challenge against it, WSPA reports.
Gaske made the complaint after her 14-year-old daughter mistook it for a children's book and was exposed to its mature content. The collection was housed in the library's adult section, but both mother and daughter believed it to be a "murder mystery" title.
"It was good at first, then it got nasty," she said. "The more into it I got the more shocked I was; I really had no idea this type of material was allowed at a public library.
"I feel that has the same content of Hustler or Playboy or things like that. Maybe even worse."
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The library's copies of Neonomicon have been removed while a committee reviews its content.
Back in 2010, a comic book store in Florida banned Neonomicon over what was adjudged to be "pornographic content".