The modifier "hot" in the query is analyzed as follows:

Sometimes, search engines associate words based on user behavior. If hundreds of people search for "The Ring Bernard Smith PDF" and then immediately search for "hot romance PDFs," the algorithm merges the intent. The phrase becomes "hot" simply because it is a high-volume, trending download in ESL circles.

The most likely explanation for the "hot" tag is that pirated PDF versions of this book are circulating on file-sharing sites that host mixed content. These sites often tag every file with "hot" or "new" to drive clicks, regardless of the actual content.