First Light, a thoroughly engaging tale that allows us to see science in the making, chronicles current attempts to reveal this hidden era—what we know and what we don’t know. Ms. Chapman herself is in the thick of this endeavor and serves as a wonderful guide, whose voice is reminiscent of Carl Sagan’s , although with an extra and very welcome dollop of impish humor. I know of no other astronomy book that includes references to Doctor Who, Tutankhamen and cyanobacteria in its metaphors and analogies. From page to page, you get caught up in her excitement.