Mark Twain and His World, Justin Kaplan, 1982 Crescent Books, Copyright George Rainbird Ltd. 1974, first edition of this edition, color origination by Westerham Press, Westerham, England, 224 pages. With more than 164 illustrations. Book is in very fine condition as is the dust jacket. The color plates in the book are fabulous.
Note: Justin Kaplan wrote another book on Twain which won the Pulitzer Prize for biography
Note: of course his name at birth was Samuel Clemmons.