Livy's Ab urbe condita Book XXII narrates Hannibal's massive defeats of the Romans at Trasimene (217 BC) and Cannae (216 BC). It is Livy's best and most dramatic book, and the one most likely to appeal to students at every level. Livy drew on the Greek historian Polybius, but transformed his drier treatment into a rhetorical masterpiece, which by a series of insistent thematic contrasts brings out the tensions between the delaying tactics of Fabius and the costly rashness of Flaminius, Minucius and Varro. A substantial and accessibly written introduction by two experienced commentators covers historical, religious, literary and linguistic matters, including the place of Book XXII in the structure of Livy's long work. A new text by Briscoe is followed by a full commentary, covering literary and historical aspects and offering frequent help with translation. The volume is suitable for undergraduates, graduate students, teachers, and scholars.