I bought the Digital Deluxe - how do I access my artbook/OST?

• The Art Book can be found in the “The Walking Dead Onslaught Art Book” directory, which should be located where you have installed the game. The following pathway is where this should be found: Steam\steamapps\common\The Walking Dead Onslaught.
  
  A shortcut is to right click on “The Walking Dead Onslaught” entry in your library and choose “Browse Local Files”.
  
  The OST can be found by viewing the game page in your library and selecting “The Walking Dead OST” in the Additional Content pane, typically found on the right side of the screen.