Produced by Magnus Lindberg of Cult Of Luna, the debut EP, Night and Day, was released later that year on Mansson's own label Winter Hymns Records.
[1] The music magazine, Rock Sound, labelled the debut effort "fantastic", and referred to it as "sublime crystalline indie ... that will appeal to fans of Jeniferever, Sigur Rós, Death Cab For Cutie and Band of Horses alike".
[citation needed] Their track, "Broken Watches", was used in the DVS Skate & Create 2009 skateboard video, attracting a following on YouTube.
[3] Their debut album, Lights, was recorded in 2010, and all instruments and vocals featured were performed by Mansson, apart from drums and percussion which were by Magnus Lindberg.
Air Castles is on the roster of international artist booking agency Pitch & Smith, and Mansson signed a publishing contract in 2011 with Mars Music AB.