The tresviri rei publicae constituendae – C. Iulius Caesar, M. Antonius and, to a lesser extent, M. Aemilius Lepidus – dominated the Roman state from their formal appointment by the lex Titia on November 27th 43 through to the battle of Actium on September 2nd 31. Despite the large amount of surviving evidence, particularly numismatic and epigraphic, this period has received surprisingly little attention from scholarship. For the most part, it is treated as a coda to the history of the Republic or a prelude to the history of the Principate. This recent volume, which arises from a colloquium held in Zaragoza from 3-5 September 2019, seeks to shift perspectives from assessing the triumviral period as a transitional phase between Republic and Principate to assessing it on its own terms. This clearly articulated aim is valuable and commendable and has had a noticeable impact on the final volume. The Augustan Principate remains largely off-stage, allowing the characters and more importantly the structural problems and attempted solutions of the triumviral period to stand out. The book consists of 21 chapters divided between an introduction, conclusion, and five distinct sections focusing on formal public institutions, war and peace, political communication (focusing on oratory, but extending to other media), social and economic impacts in Italy, and the provinces.