SPOILER ALERT!

Reading progress update: I've read 266 out of 433 pages.

The School for Good and Evil #2: A World without Princes - Soman Chainani

Okay, this gender swapping spell is interesting and promising. What it says that Sophie won the related challenge (mirroring how Agatha got across the bridge to the Boys' school), gnomes who, when younger, can change gender freely and that this is connected to their neutrality and peaceableness.