The Throne of Caesar

The Throne of Caesar is a historical mystery novel by American author Steven Saylor, first published by St. Martin's Press in 2018. It is the thirteenth book in his "Roma Sub Rosa" series of mystery stories set in the final decades of the Roman Republic. The main character is the Roman sleuth Gordianus the Finder. 
The book begins March 10 and ends March 23, 44 B.C. It describes the assassination of Julius Caesar on March 15, the Ides of March. 