I do have suggestions for a variety of horror oriented book displays for this month. However, I want to emphasize that horror, like any other genre, should not be promoted for just one month a year. Readers will pick up horror all year; this is especially true now as the popularity of horror continues to increase. Authors like Stephen King and Grady Hendrix have fans who don't read much other horror but might enjoy read alikes for the works of either of these authors.
The borderlines between genres continue to be blurred. There are horror novels blended with any genre you can think of including romance and comedy fiction. There are horror novels being published now that include elements familiar to mystery readers including police procedurals. As I have mentioned before, many novels have subject headings of suspense/thriller/mystery in addition to horror. Take this as an indication to include horror with your displays of crime books throughout the year. Many readers will be open to trying out a horror novel that includes themes or elements that they enjoy in the thrillers or suspense novels they read.
Crime fiction varies as far as levels of terror and violence explicitly described on the page, just as horror does. Most library workers are familiar with asking mystery fans if they lean towards cozy mysteries or something with more sex and violence like a noir. We also ask readers how spicy a romance they are seeking. The same sort of questions can be asked of a reader to determine what sort of horror novel they would enjoy.
Don't predetermine that a reader will not enjoy horror because they haven't regularly picked up any. Mix it in with your displays all year and allow your patrons to discover new authors and books. Any book is a beach read. My experience is that people love to take suspenseful novels to the beach with them (partially based upon what comes back with sand in the covers.)
Included below are some lists to get you started:
20 Essential Crime and Horror Crossovers - Crime Reads
Scares of Every Kind: Two of the Best Genre-Blending Horror Novels - Book Riot
More Genre Blending Horror Books You Should Be Reading - Book Riot
Nefarious Bedfellows: These Twisted Books Blend Crime and Horror - The Line-Up
10 Books That Perfectly Blend Sci-Fi & Horror - Screen Rant
