Vol 1 is 1915-1928
Vol 2 is 1929-1936
Vol 3 is 1937-1942
Volume 1 alone is bigger than the Std Ga book. These will be a seminal work on Lionel O Gauge. More pictures, more understanding, better explanation of all things O Gauge, from a production standpoint. More charts, more stories, more of just about everything you could want. The 3 volumes could be more than 1200 pages! Volume 1 will be available for delivery before Christmas 2017. Here is a sneak peak of the cover.
You can pre-order here: Lionel Vol 1