Dungeons & Dragons Conversion Manual (2000)

From the web:

Your character is ready for the new DUNGEONS & DRAGONS game. Are you? You know where to start. Find the new D&D Player's Handbook wherever you buy games. We've made the change. Now it's your turn. 

From the introduction:

This booklet is intended to help you preserve the best of your old D&D campaign as you adopt the new rules.

This was a free promotional product provided by Wizards of the Coast prior to the release of Dungeons & Dragons 3rd Edition.