A: The third edition of Disney A to Z was complete at the time of its compilation, which was 2005-2006. Everything from the two previous editions was included, plus new information. There are no current plans for a fourth edition, and as of now, the third edition is not available electronically.  The encyclopedia is updated monthly on the Disney website by clicking here. [Note: A fourth edition was published in 2015 as a Sam's Club exclusive.]