Don't know if Du have heard about this, but recently(2009)a book series came out based on the USA Network Fernsehen series. Bücher in the series include:
Psych-a mind is a terrible thing to read
Psych-mind over magic
Psych-call of the mild
Psych-mind altering murder
Psych-a fatal frame of mind
They are all written Von American Fernsehen producer and writer(and author) William Rabkin.
It is not the same as watching the show, but it is entertaining to read since he is so spot on with Shawn and Gus's personality.
I have only read 'A mind is a terrible thing to read,' but so far it has been worth Amazons $8 price.
Highly recommended for all Psych fans!!!
(The one i am Lesen currently takes place before Shawn and Juliette get together)