it seems there's no way to start the new dlc story from the menu please help !

I picked Gavin. Sorry, Percy was just creepy giving the MC always the feeling to be a helpless idiot. Percy was challanging, but he had some real character. So no regrets there. Ending was a bit sudden, though.

Any email contact for press purposes?

I wasn't able to get it working at first, but I did eventually track down the problem, and the DLC works perfectly fine now. That preface out of the way, here's my fix; I clicked on the little "Manage DLC" button on the Library page for the base game, and on the popup window noticed that the DLC didn't have the little check mark in the box. Upon clicking it on, the DLC immediately downloaded, and runs as intended. If you can't get it to work, you may need to tell steam to install it manually, like I did....