Where’s the rest of the Damned World?!

I know, I know I haven’t posted in, like, a month. Sorry, but I’ve been reading a lot. Plus Kindle: Amazon’s 6″ Wireless Reading Device came out recently, so I’m excited about that. Anyway, I recently picked up Darkness of the Light (The Hidden Earth Chronicles) by Peter David. And it Rocks! Peter David is a big name comic book writer, so he really knows how to toss around some heroic action, and in Darkness he really delivers.
The basic premise is that humanity is virtually extinct, having been wiped out by a group of aliens. The twist here is that the aliens are the monsters and legends from humanity’s past, Minotaurs, Cyclops, Dragons, Mer-people, etc… Apparently they have all visited Earth in the deep past as scouts, and become part of human legend. They are actually exiled from their own planets and refer to the Earth as “The Damned World”.
Now the thing that pisses me off is that Darkness was released as a Mass Market Paperback in 2007, that’s over two years ago people. It’s supposed to be part of a larger series called “The Hidden Earth”, but I haven’t been able to find the second installment. I can’t believe that Tor (the publisher) would just kill a project that has this much merit, but I cannot find any information about it anywhere. Does anyone out there know anything about this? In any case, I’m looking forward to reading the next installment, if it ever happens.