With an infectious enthusiasm for his subjects, Andrew Bradstock has produced a decidedly useful anatomy of the radical religious movements of the mid-seventeenth century, a sort of heresiography, though one in which, unlike those of his early modern precursors, the heretics are taken seriously and treated with respect. Although Christopher Hill is saluted as the inspiration for the work, Bradstock also draws with care on more recent accounts in what has been a fertile area for modern historiography. But he wears his scholarship lightly, and the book certainly has an appeal to the general reader and could, with confidence, be recommended to undergraduates, for whom it readily answers many of the questions often raised about distinctions between the faith communities he considers. His account of Baptists, with its careful analyses of their origins and diversity, is particularly valuable, though he writes well on Diggers, Ranters, Fifth Monarchists and Muggletonians. Perhaps the surprise inclusion is the chapter on Levellers, but here Bradstock has a point to prove, fending off the tendency to see them as precursors of secular political theorists, and demonstrating that their thinking on concepts such as equity was rooted in the radical religious tradition. It would, however, have been valuable had his concept of radical religion stretched a little further to include chapters on independency and even presbyterianism, which, after all, seemed beyond the pale of Anglican toleration by 1662.