Please, help the first-time steam user (me)!

I have the digital collector’s edition. As soon as I registered on Steam, the info field in my profile says the following:

Game added to Steam profile
Soundtrack added to Steam profile
Artbook added to Steam profile

I found and installed the Steam client and the game, but I cannot seem to find the soundtrack and the artbook. Where are they supposed to be?

the soundtrack is the game folder steamlibrary/steamapps/common/kingdomcomedeliverance/soundtrack and the artbook i dont know

can’t find it either
steam says its registered to my account but its not there
I guess we have to wait till we get an official statement