In a month, on October 13, B.T.R. will present their new album with a concert in Hall 1 of the National Palace of Culture. It is the 13th in a row and is called "Puzzle" – named after their song, which is dedicated to true friendship. It also focuses on life choices that each of us makes every day, arranging the puzzle of their own life, band frontman Atanas Penev, says. Like most of B.T.R.’s songs, the music and lyrics are by Slavcho Nikolov and the arrangement is band’s work.