Acta Muciorum is a second-year Latin reader for students who have completed A New Latin Primer, Cornelia, and Carolus et Maria. It is classical in flavor and well-suited as a bridge between the first-year readers in the series and Caesar. The first forty chapters contain a historical-fiction narrative about the famous Roman family, the Mucii, the next twelve chapters are simplified Caesar, and the final eight consist of unadapted Caesar. Acta Muciorum contains 1497 unique vocabulary words; of these, 537 are used in the previous books in the series and 93 are proper names. In the second half of the book, notes on forms and syntax, exercises, vocabulary frequency lists, and a glossary are provided.