Scott Kelby will release new Panther editions of his best-selling “Mac OS X Killer Tips” and “The Mac OS X Conversion Kit” books at the San Francisco Macworld Expo this week. Show attendees will have the opportunity to pick up advance copies at the Peachpit Press booth or the NAPP/Wacom booth where Kelby will be sharing his favorite Panther tips, answering questions, and signing autographs. The two books retail for US$39.99 each, but special discount pricing will be offered at the Expo.