Jeff Mariotte's "The Folded World". An excellent stand-alone TOS novel (we need more stand-lones from the other series.). And Ignition by Kevin Anderson and Doug Beason. A kind of "Die Hard" (admittedly, loosely) story involving the space shuttle.
This is where I shamelessly brag that Jeff is currently writing a weird western novel for Tor Books, based on the "Deadlands" role-playing game . . . .