The SPQR series is a series of historical mystery stories by John Maddox Roberts, published between 1990 and 2010, and set in the final years of the Roman Republic. SPQR (the original title of the first book, until the sequels came out) is a Latin initialism for Senatus Populusque Romanus ("The Roman Senate and People"), the official name of the Republic. In 2015, a German company had planned to adapt the series for TV, however, they have withdrawn from the project in 2022 for financial reasons.