Back then, we had a much tighter category/subject structure and one of those specific categories was Teen Horror, which featured R. L. Stine, Christopher Pike, Carolyn B. Cooney, L. J. Smith (Vampire Diaries) and others in similar vein.
Sometime in the mid 2000's, we switched to standard BISAC categories for book shelving and all of these titles wound up in the Juvenile Fiction/Horror & Ghost Stories which may be appropriate but it lumps in Teen fiction with middle grade (Goosebumps) and early readers as well.
In an effort to restore the categories we used to use which were far more organic in nature and easier to browse, we're slowly eliminating BISAC categories from our site and restoring our proprietary subject headings.
So, we're proud to start the effort with the restoration of the Teen Horror category!
In the near future, we'll be revamping and restoring our Science Fiction::Star Trek category, adding a Contemporary Fantasy category, and adding a Steampunk category as well.