Trivia / Boogiepop Series

  • No Export for You: Seven Seas published the first three and sixth books before stopping due to poor sales. Thankfully, book 6 is a prequel to 1 and 2-3 is a self-contained story arc, so it's not like they ended on a cliffhanger.
http://tvtropes.org/pmwiki/pmwiki.php/Trivia/BoogiepopSeries