Shatnerquake is a novel by Jeff Burk. Here's the premise:
It's the first ShatnerCon with William Shatner as the guest of honor! But after a failed terrorist attack by Campbellians, a crazy terrorist cult that worships Bruce Campbell, all of the characters ever played by William Shatner are suddenly sucked into our world. Their mission: hunt down and destroy the real William Shatner.
This is so Shatnerific that I'm having a screaming Shatnergasm right now.
http://bizarrocentral.com/book_detail.asp?bookID=97 via Topless Robot