At its heart, American Tropics is about place-based biology. Raby is invested in the ways in which place, as well as the political, social, and environmental structures of that place, have affected the production of biological knowledge over the past century. Beginning with the period just before the Spanish-American War, Raby demonstrates how these place-based biological stations rest upon imperial, and "neo-imperial" sites of conquest and power, in order to produce knowledge that is perceived to be by and for white westerners (she is particularly interested in the US). As she argues, "scientific place" was created by removing "unscientific" elements, specifically including indigenous and other non-white voices, bodies, and ways of knowing. (129) Aside from racially oppressive knowledge production, Raby also pays particular attention to the ways in which "pure science," or science for the sake of knowledge, has been at times buttressed by (and at times, against) practical science. As she argues, it is worth considering how much our scientific knowledge (whether about tropical biodiversity, or otherwise) stems from intended practical purposes. These are often, as she has demonstrated, imperial in nature.
Raby structures American Tropics in a "change over time" format, examining the myriad pressures put on American scientists in the tropics over a century: 1890s-1980s. Many of her primary sources stem from the various publications of these scientists themselves, charting this change over time. In this regard, Raby does a nice job of balancing the science and the large cast of characters actually "doing" that science. This further supports her argument that these biological epistemes are intrinsically linked to human (again, often imperial or neo-imperial) concerns. By following the places themselves over the century, Raby is able to demonstrate the circumstances and people who give birth and meaning to these spaces. The change over time method does leave some wanting more in-depth discussion of certain people, places, and chronologies. Yet it seems clear that tracing the evolution of place-based science was Raby's intent, and she has accomplished it well. Further combing through her bibliography will allow those wanting more to find what they are looking for.