The Global Citizen
Essential and easy reading for anyone who wants to get both the skinny and the comprehensive on the "the limits to growth," which is, by the way, the title of another terrific book written by her.
Also, devastingly cheap, right here: http://www.amazon.com/Global-Citizen-Donella-H-Meadows/dp/1559630582/ref=sr_1_1?ie=UTF8&s=books&qid=1309553811&sr=8-1