Lewis Barnavelt's legacy continues as Brad Strickland lists the next title on his website. The Whistle, the Grave, and the Ghost is due out summer the 2003. For now, The Tower at the End of the World is his latest release, with cover by illustrator S.D. Schindler. Says Brad:
The next book (The Whistle, the Grave, and the Ghost) will be out, my editor tells me, in the summer of 2003 because Dial's rejiggering its publication dates so that Halloween books come out in summer. Although John Bellairs' characters have run up against evil sorcerers, animated mummies, and ghosts before, they've never had to deal with a classic monster, like, oh, say, a vampire...until now.