Natives and Exotics is a book I find easy to admire and difficult to love, a book that is complex and suggestive, its prose a model of exactness, and yet it feels more like an essay than a novel, its structure designed to highlight correlations and hypotheses rather than emotions or characters. (I mean that as an observation, not a criticism -- I doubt Natives and Exotics would be half as interesting if its characters were as developed as its historical perspective. The muted emotions, in fact, are a relief when so many novels feel like overfed emoticons .) Nonetheless, it can be difficult to adore a novel about the overlapping colonizations of plants and humans in the past few centuries, wondrous as such a book may be, because it remains at a distance, an engine of concepts that invite us to think about them rather than sympathize with them, to gaze at rather than ingest. Thankfully, there's nothing wrong with admiring a book without adoring it, and there is much to admire he...