Battle of the Somme Component Set contains all the components published in the book, but as separate components. Included is 8.5" x 11" map, Reference Card, and all game markers and all counters included in the book, including Advanced counters. In addition, we've included an Advanced Game Rules folder, containing all the rules necessary to play the advanced version of the game. This means that if you have Poor Bloody Infantry: Somme, and wish to upgrade to Battle of the Somme, you can purchase this set an receive the Advanced version of the game as well. This means you can Upgrade to the new edition (with new counters, Advanced rules, advanced counters) by ordering this set, if you already own PBI: Somme. However... While upgrading may be good for some, we definitely believe the new book version contains enough new material (two new scenarios, a few new optional rules, and several sections of historical commentary, maps, and designer's notes), that we feel you would be well served to buy the new edition, which is the definitive edition of this game system. What's included in the Battle of the Somme Component Set: One map*, one Reference Card**, Counter sheet 1*, Counter sheet 2*, Counter sheet 3*, Counter sheet 4**, Advanced Counter sheet 5**, four-page Advanced Rules folder**. *=components from PBI: Somme **=new components in this edition —description from the publisher