Wilds of Wisteria — Angela Pepper

Zara Riddle signs up for a patch of land in the Wisteria Community Gardens. She's hoping for a bumper crop of pumpkins, but grows a dancing skeleton instead. That's not going to work in a pie. Soon she finds out that the only place more magical than Wisteria is the subterranean city below, the network of tunnels known as The Wilds.