An overview of the Republican system of litigation.

Bruce Frier's "The Rise of the Roman Jurists": https://press.princeton.edu/books/hardcover/9780691639567/the-rise-of-the-roman-jurists

Thomas & McGinn's "Ancient Law, Ancient Society": https://www.amazon.com/Ancient-Law-Society-Dennis-Kehoe/dp/0472130439

Ernest Metzger's "Litigation in Roman Law": https://global.oup.com/academic/product/litigation-in-roman-law-9780198298557?cc=us&lang=en&

Andrew Lintott's "The Constitution of the Roman Republic":

https://www.amazon.com/Constitution-Roman-Republic-Andrew-Lintott/dp/0199261083

Andrew Lintott's "Imperium Romanum": https://www.amazon.com/Imperium-Romanum-Administration-Andrew-Lintott/dp/0415093759

T. Corey Brennan's "The Praetorship in the Roman Republic": https://www.amazon.com/Praetorship-Roman-Republic-Origins-122/dp/0195114590