This report describes a long-range project designed to make available to the general public all the printed works authored by Mark Twain in "authoritative texts" that correspond as closely as possible with his last known or discoverable intent. Briefly outlined are the project's methodology for selection of 13 editors working under a four-man editorial board, the specific responsibilities of each volume editor, and the editorial procedure followed, including machine and sight collations of variant texts. The report concludes with a review of progress to date and a discussion of problems related to the satisfactory completion of the project. (JK)