Number five in the series, Thomas Trew and the Flying Huntsman, is just about to come out in the UK. Look for it at your local bookstore! It's coming out in Australia in March 2008. Like no 4 in the series, Thomas Trew and the Selkie's Curse, it features some terrific reviews by young readers, from schools in Britain and Australia.
The Flying Huntsman was one of my favourites to write. It's a very tense and rather creepy story, set in the strange sky-world of the Ariels. And Thomas is in even more danger than he's ever been before!