I have a novel where I have an excellent comparative ("comp") title in mind, but the book is part of an ongoing series of novels (scifi/fantasy, if it matters). The suggested time range for a comp title is 3-5 years, and there has been a book in the series published within that time frame. I've seen only oblique references to the issue if the comp title counts, with somewhat conflicting advice. Is the comp title considered "current" because of the ongoing series, or is it out-of-date because the original book in the series was published over 20 years ago? Is it only current if I reference the very latest book in the series?
I could supply more specifics if needed, but I'm interested in the more general question since I've read a LOT of books in series that are still being published.