This letterbook covers the period August-December 1910. Most of the correspondence is by Edison, Harry F. Miller, George A. Meister, and Ademor N. Petit. Many of the letters pertain to Edison's accounts with the Edison Portland Cement Co. and J. P. Morgan & Co.; cement construction projects; and ongoing progress in the manufacture of molds and patterns for use in the construction of Edison's concrete house. There is also correspondence regarding the production of Edison's improved alkaline storage battery and its use in automobiles, trucks, electric railway vehicles, and submarines. A letter to investor Arthur I. Clymer mentions Edison's $1.9 million cash payment for stock in the Edison Storage Battery Co. Among the items relating to personal and family matters are letters involving Edison's membership in clubs and societies; his orders from Brentano's bookstore in New York City; his recollection of a phonograph recording of Count Leo Tolstoy; and his charitable donations, including his contributions to an anti-cigarette movement and a Christmas fund for the destitute. Also included are several items concerning Edison's opinions on immortality, spiritualism, and organized religion.

The label on the front cover contains the following notation: "-1910- TAE Letters  From Aug 29th To Dec 15th 1910." There is an inscription on the spine with similar information. The book contains 701 numbered pages and an index. Approximately 10 percent of the book has been selected.