My wife and I recently founded a press devoted to publishing literature with vegan themes and characters. And we're proud to have published (this month) the first novel in a three-part trilogy: Out of Breath, by Blair Richmond.
You can read more about it here: http://www.AshlandCreekPress.com
(and download a sample). The novell is receiving great reviews so far. It's a YA novel, so it's a great read for both young adults and adults.
Next year, we have three more novels planned, all with vegan protagonists.