“Fengselsfugl” is the long-awaited follow-up to his critically acclaimed album and Hubro debut “Bedehus & Hawaii” (Prayer house and Hawaii) from 2019 which was inspired by his deeply religious grandparents and their strange prayer house music that according to Trond sounded a bit like Hawaiian guitar-music or slack key. Both albums follow an artistic concept that is based upon his encounters with environments that stand next to the established. “Bedehus & Hawaii” was highlighted as one of the 15 best jazz albums in 2019 by Bandcamp - one of the world's largest websites for selling music: "Kallevåg has created one of the most gorgeous recordings to hit the shelves in 2019!"..."The contemplative release from Trond Kallevåg is a deep dive into serenity, where melodic improvisations melt into indistinguishable shapes and take on the logic of dreams." He has also by numerous reviewers been compared to guitarists like Ry Cooder and Bill Frisell. "Bedehus & Hawaii" locates Trond Kallevag Hansen at the right height on the heels of Ry Cooder and Bill Frisell." - Jazzaroundmag.