User blog comment:SonOfZeus1200/The Camp Half-Blood & Kane Chronicles Series will collide!/@comment-3146930-20130201114544

Just an Update:

Rick Riordan has stated on his blog that a Percy Jackson/Carter Kane story called The Son of Sobek will be released in the paperback version of "The Serpent's Shadow." Based on this preview, it takes place before The Son of Neptune, when Percy was trying to find his way to Camp Jupiter.