According to the Grenier Games web site:

IN THE TRENCHES: THE LOST GENERATION

NOW AVAILABLE FOR PRE-ORDER (SAVINGS OF 20%) !

Starting today and until July 19, In the Trenches: The Lost Generation is available for pre-order at the lowest price ever to be listed on this web site. On July 20, ITT:TLG will begin shipping and will be available for purchase at a price of $59 CAD, but until July 19 this game can be pre-ordered for $47 CAD, a savings of more than 20%! This game will never be listed on this site at a lower price. Pre-orders will not be shipped until after July 16, in order for us to build up a stock of orders to bring to the printers ahead of time.

In the Trenches: The Lost Generation is the second game of the In the Trenches series. Designed by John Gorkowski, this series enables players to game historically accurate simulations of tactical operations of the Great War. While ITT: Opening Engagements featured three operations from the Battle of the Frontiers, the Siege of Tsingtao, and the opening battles in Poland, ITT:TLG has a total of NINE operations. Five depict the Battle of the Somme, while the Battle of Verdun and the Brusilov Offensive have two operations apiece. For only a few dollars more, ITT:TLG has one more map, a few dozen more counters, and three times as many operations to play as ITT:OE.