Start with high-confidence ethnomusicology books, then narrow by subgenre or adjacent topics.
Divine Inspirations
David Harnish, Anne Rasmussen
Soundscapes of Uyghur Islam
Rachel Harris
Burst of Breath
Jonathan David Hill, Jean-Pierre Chaumeil
Dust of the Zulu
Louise Meintjes, TJ Lemon
Music
Ted Gioia, Jamie Renell
Sonic Theology
Guy L. Beck
Cubano Be, Cubano Bop
Leonardo Acosta