Each of the Dungeons & Dragons core rulebooks has been revised and updated for clarity and content. Each revision integrates user feedback received since the original product release so as to address the specific wants and needs of the player and Dungeon Master audiences. The overall rules system remains intact, with changes targeted specifically at elements of game play that were considered under-powered or incomplete. These revised editions also contain bonus content, such as new feats, that are exclusive to these editions. In addition, the new and revised content instructs players on how to take full advantage of the tie-in D&D miniatures line planned to release in Fall 2003 from Wizards of the Coast, Inc. Overall changes to all the titles include making complex combat easier to understand and provide more information on interacting with and summoning monsters. Specific changes include the following: the Player's Handbook received revisions to character classes to make them more balanced, and there are revisions and additions to spell lists.