Making of Psychonauts
Double Fine was founded in the year 2000 and the first game the team set out to work on was to tell the tale of a psychic circus runaway and his quest to become an international psychic secret agent - in other words, a Psychonaut!
The Manual
Back when Psychonauts was released, games didn't rely on in-game tutorials to teach players about the game, instead it was common practice for games to ship with a manual. This was a printed pamphlet that explained how to play the game, so you could read it on the bus home, or to give you something to do while the game installed.
The Psychonauts Manual (Windows Edition)