ooh, good question!
Becky Chambers - A Closed and Common Orbit (I've read all but two of her books this year and they're all great, but this was the best)
Alix E. Harrow - The Ten Thousand Doors of January
Sue Dawes - The Mune
Miki Berenyi - Fingers Crossed: How Music Saved Me From Success
Natasha Pulley - The Hymn to Dionysus