I have tentative release dates for my books from the publisher. Remember, these dates aren't set in stone, so if they change, don't shoot the messenger (me)!
The one you've been asking about, Alien Salvation (Kalquor 4) is set for release sometime in November. One month away, gang!
If Amazon cooperates, Unholy Union will be available for the Kindle this weekend.
Netherworld: Drop Dead Sexy is scheduled for an early January release.