. . . The Battle of the Labyrinth. Today, Publishers Weekly announced the title for Percy Jackson 4, along with a first look at the cover by John Rocco. You can read the whole article here.
The main website at http://www.rickriordan.com/ has also been updated. Check back for more info over the next few months, as I'll try to keep you updated on the latest developments in advance of the launch date: May 6! See you in the Labyrinth, half-bloods . . .