An adaptation of Dan Brown’s Inferno is set to hit theaters at the end of October, but another adventure featuring its hero will be hitting in 2017: Doubleday Books will release Dan Brown’s Origin next September.

The books are some of the most popular ever published

The novel will join the other novels in Brown’s Robert Langdon series. Angels & Demons, The Da Vinci Code, Inferno, and The Lost Symbol have collectively been some of the most popular novels ever published. The series follows Robert Langdon, a Harvard professor who specializes in religious iconology and symbology. Each novel follows the character over a single day as he encounters some sort of earth-shattering conspiracy, solved only through his knowledge of ancient and religious symbols, as well as the history of art and architecture.

Ron Howard has directed an adaptation of each of the novels, which stars Tom Hanks as Langdon. Origin is expected to be published on September 26th, 2017.