[Twisted-Python] Twisted book(s)?

[David Conradie]

I'm fairly new to Python and very new to Twisted.   I find I learn new 
material best from a book, so although I know there's lots of great 
documentation and examples on twistedmatrix.com, I was considering 
getting O'Reilly's Twisted book ('Twisted Network Programming 
Essentials' by Abe Fettig).  But that book dates back to Oct 2005 so I 
was wondering if it's still a worthwhile purchase - I'd guess Twisted 
has moved a good bit since the book was written.  Any opinions? 

Thanks

/David Conradie/
<gtalk:dave.conradie at googlemail.com?message>

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