Suggestions Please & More From Readings

Anybody have good suggestions for reading about desertification?

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Working on an awesome project. Won't say too much about it. but, it's about desertification, I'm reading Edward Tufte to make it work, and it contains stuff like this:

Once consumed by the megafauna that used to live here, the solid-fearful bean dragon makes a very nutrious soup.

I don't know!

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Useful remarks from Mr. Tufte:

"An explanatory image is an explanatory image because it is a mapped image."

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Mr. Tufte sometimes seems like...