From the Amazon link you posted;
"You feel like you're sitting in the room with him," said Linda Morris, professor emeritus of English at the University of California, Davis. "You get a very, very strong sense of his voice and a strong sense of his thought association."
Versions of the information have been released over the years by editors who snipped and jiggered, carved and fuddled. This is the first time it has been left in the order Twain dictated and with the honesty requiring the century-long embargo.
"What he decided was an autobiography as a chronology is a nonstop lie," said Gregg Camfield, a Twain scholar and literature professor at the University of California, Merced. "A real life is all the digressions; it's all the side trips. What he wanted to do was show a mind at work."
BTW It's a good thing Joel Leyden the author wasn't trying to show off the incredible writing skills he picked up from Sam, "But I will only articulate and limit my feelings about Sam from that house he lived in. One can tell much from what is on both the floor and the walls and in between."
- floor molding???
Nope
Cigar Smoke
He was smoking 40 cigars a day. Some of that smoke is still wafting around that old house between the floors, the walls and the ceiling.