The most painful chapter was "Rarity Unto Death," in which he recounts selected stories revealing how various animals (and peoples) have been lost to extinction. The discussions of the extinction of the dodo and other wild creatures are terribly sad; the horrifying tale of the demise of the Tasmanian aborigines is heart-rending and infuriating.
In the end, Quammen's workmanlike effort establishes a "big picture" demonstrating how small, isolated ecosystems render their wild inhabitants increasingly vulnerable to extinction. We come to see that the biological notion of "islands" applies increasingly not just to small land bodies surround by water, ...