[asterisk-users] Good Book to learn SIP

[Steve Totaro]

Justin Case wrote:
> Hi List,
> I am trying to learn SIP in its entirety. I have so far found:
> http://www.amazon.com/SIP-Demystified-Gonzalo-Camarillo/dp/0071373403 
> <http://www.amazon.com/SIP-Demystified-Gonzalo-Camarillo/dp/0071373403>
>
> Anyone know of any other books that are worth reading ?
>
> Thanks.
>
> Justin
>

The RFCs are online as well as anything else you could want to know.  
Are you just a book person? 

Thanks,
Steve Totaro