There's a new version of the free networking book.  New meshers should read it.   Actually, most of the old meshers should read through it, too. 

It's not specifically about our HSMM-Mesh/Broadband-Hamnet system, but it's got a lot of practical information about networking in general.  It will answer a lot of the questions you'll ask when you start ham meshing.

Wireless Networking in the Developing World

It's called "Wireless Networking in the Developing World," but a lot of the info is very good for what we do.

Even if you think you're an expert, it's worth looking at.  

I'm an old networking guy from way back, and sort of thought there was nothing there for me, but once I worked my way through the stuff that's old hat to me, there's a lot of very useful stuff that's either new to me, has a more practical bent to it, or is a good refresher for parts of the art of networking that I haven't thought about in a while.