The Final Hours of Portal 2
This is a book that takes you deep within the top-secret offices of Valve.
The Final Hours of Portal 2 is a digital book that takes you deep within the top-secret offices of Valve for an unvarnished look at the creative process behind Portal 2. The 15,000 word story is complemented by dozens of photos, interactive diagrams and multimedia features, plus interviews with Valve founder Gabe Newell and actor Stephen Merchant (the voice of Wheatley).