Night of Cake and Puppets

This novella fills in the gap in Daughter of Smoke & Bone, where Karou was busy traveling around the world and came back to see Zuzana and Mik officially dating. It's a cute story featuring their magical first date and first kiss. No grim war, no deaths, no bitter betrayals here―just sweetness.

I think it's a nice addition to the series that fleshed out Zuzana and Mik a bit more, giving more substance to their relationship and allowing you to know them better.