In September 2014, Iron Maiden began recording their sixteenth studio album, "The Book of Souls", at Guillaume Tell Studios, Paris. The release features two songs written solely by Dickinson for the first time since "Powerslave", "If Eternity Should Fail" and "Empire of the Clouds", the former originally penned for a possible solo record. "Empire of the Clouds" is notable for being the band's longest ever song, at over 18 minutes in length, and features Dickinson on piano for the first time, which is how the song was written. The band toured the album in 2016, during which Dickinson once again piloted the band's private plane, Ed Force One (now a Boeing 747-400 jumbo jet).