In his second solo album, "Maschine", released in 2014, Julia Neigel, Wolfgang Niedecken and Toni Krahl also appeared as duet partners. The album contains some new additions to well-known Puhdys hits from the 1970s, including "Geh zu ihr" and "Wenn ein Mensch lebt". Also in 2014, on his 70th birthday, Birr's autobiography "Maschine – Die Biografie." was released.