Culley's fourth album, Stripling, was released on 27 April 2015. R2 (Rock'n'Reel) awarded Stripling four out of five stars, and compared Culley to Tim Buckley and John Martyn.Raggatt, Trevor (July/August 2015), Karl Culley "Stripling" Review, R2 (Rock'n'Reel), Volume 2, Issue 52, p. 92
