An Illusion of Thieves (2019)

Romy, her thieving brother, a swordmaster and a silversmith must use forbidden abilities to prevent a political disaster. Their differences of experience make assembling the team an important part of the book, rather than a quick prelude to the break-in. The risk of being exposed as sorcerers gives cooperation a cost beyond losing the prize. A good choice for patient recruitment and a meticulously prepared operation; it begins the Chimera series.