David- Nice to hear from you again! i hold in my hands, Mark Twain A-Z, by R. Kent Rasmussen, published by Facts on File, 1995. It is subtitled The Essential Reference to His Life and Writings. ISBN-0-8160-2845-1 (this is a unique number that the bookstore can use to order the book). Cost is $45.00 US and 59.95 Canadian according to the cover flap. It is a great reference tool, containing a very complete index, and a large suggested reading list, in addition to a chronology of books by MT. It is about 8 1/2 x 11 inches on size, and has 552 pages. There is a great map of the U.S showing where he lived, traveled, worked, etc. And a good chronology of his life (15 pages!)divided into the following headings: Residences and Travel, Personal & Business, Writing & Publishing, Family & Friends, Literary Events, Historical Events. It's a fascinating work. We have purchased it for our Central library's reference collection. Thanks Mr. Rasmussen for the thorough job! Mary Lou Caskey, Assistant Director, Mid-York Library System, Utica, NY