This first in a three book volume set is, to be honest, a beautiful book. It arrived for me this morning, an expensive thing I picked up due to the Australian dollar, a birthday, and the notion of it being finally published. Twain, reportedly, had started many autobiographies before, and failed, and it was not until he hit upon the plan to dictate them that he wrote this that is here. A flip to the first pages of it (about half way into the book) show that he planned to write six hundred thousand words. Maybe he did. He has three volumes, after all.
But, on first glance and a flip through, I cannot say how fine a job the University of California Press have done on the book. It's a beautiful book, and comes filled with additional notes, pieces from failed attempts, and writing from his library. Primarily edited by Harriet Elinor Smith, it is also edited, the book says, by the Mark Twain Project, and in truth, just at a glance, you can see the work and love that has gone into it.
Follow the link, check it out, and buy it from wherever you want--if you have any interest in Twain, this is for you.