Sally Rooney.Getty

Irish author Sally Rooney will publish her fourth novel "Intermezzo" in September this year. 

Sally Rooney's latest work, which will be published by Faber on September 24, focuses on the complicated relationship between two brothers in the wake of their father's death. 

Brothers Peter and Ivan Koubek have very little in common. Peter, a successful Dublin lawyer in his 30s, has seen his life unravel following the death of his father and is now medicating himself to sleep. He is also struggling to balance relationships with two different women - his first love Sylvia and college student Naomi. 

Ivan, on the other hand, is a 22-year-old competitive chess player who has always seen himself as socially awkward and the complete opposite of his older brother. 

Dealing with the death of his father, Ivan finds himself in a relationship with Margaret, an older woman emerging from her own turbulent past. 

Faber Publisher Alex Bowler described the novel as a "story of brothers and lovers", adding that Intermezzo represented an "exquisite advance" in Rooney's career. 

"Intermezzo is a story of brothers and lovers, of familial and romantic intimacies, of relationships that don’t quite fit the conventional structures," Bowler said in a statement.

"After three miraculous books, Sally Rooney’s millions of readers will recognize the beauty and insight, the pain and hope that radiates from this new novel. But it marks an exquisite advance, too, in the work of a writer who seems so attuned to our lives, our hearts, and our times." 

Rooney's first two novels "Conversations with Friends" and "Normal People" have been adapted into television miniseries, while her third novel "Beautiful World, Where Are You" was released in September 2021 to widespread critical acclaim and became a New York Times Bestseller.