The Burnished City, book 1: Notorious Sorcerer
Davinia Evans2022

Welcome to Bezim, where sword-slinging bravi race through the night and rich and idle alchemists make magic out of mixing and measuring the four planes of reality.

Siyon Velo, Dockside brat turned petty alchemist, scrapes a living hopping between the planes to harvest ingredients for the city's alchemists. But when Siyon accidentally commits an act of impossible magic, he's catapulted into the limelight--which is a bad place to be when the planes start lurching out of alignment, threatening to send Bezim into the sea.

It will take a miracle to save the city. Good thing Siyon has pulled off the impossible before. Now he just has to master it.