It's a fun read for anyone interested in the history of the West, although determining what portions Mr. Clemens wrote were true, what were exaggerated, and what were completely made up are a mystery to many general readers.
Chapter 24, the account of the "Mexican Plug", is considered to be one of the finest pieces of humor he wrote.
Download available from Gutenberg.
Twain is one of my favorites!
Have ya ever seen Hal Holbrook do his impersonation of him?