CASSETTE. Fossora is Björk's tenth album. The album was partially inspired by the 2018 death of Björk's mother, Hildur Rúna Hauksdóttir, particularly the songs "Sorrowful Soil" and "Ancestress". The album features contributions from American singer Serpentwithfeet, Björk's two children Sindri and Isadóra, Indonesian dance duo Gabber Modus Operandi, and a bass clarinet sextet