The sister duo haven't released new music since their 2017 covers album, The Con X: Covers.

Updating fans on their next album, Tegan and Sara wrote on Twitter, "Record A New Album - Check. Name The New Album - Check. Choose The First Single - Check. Approve Album and Single Artwork - Check. Choose Release Date - Check. Announce The New Album + Release Date - Shortly."

The duo have a joint memoir coming out in September. Expanding on the book release, the duo said, "How did you start your band? When did you know that you were gay? What were you like before Tegan and Sara? We have spent twenty years answering those complicated questions with simple answers. Writing High School gives us the opportunity to tell the intricate stories that shaped our relationship as sisters, musicians, and queer girls."

Tegan and Sara's high School memoir lands 24 September, and is available to pre-order now.