Thank you, as always, to the friends and colleagues who have helped bring this story to life:

My agent, Sarah Davies, for the guidance, support, and enthusiasm for this book since it was just an idea in my head. I am so grateful for your feedback at every step along the way, for each and every project.

At Crown Books for Young Readers, I am so fortunate to get to work with my fantastic editor, Emily Easton, on our seventh book together! Thank you also to Sam Gentry, Phoebe Yeh, and the entire team at Random House Children’s Books. It’s such a pleasure working with you all.

I am so incredibly thankful to my friends and critique partners, Megan Shepherd, Elle Cosimano, Ashley Elston, and Romily Bernard, who are always willing to offer their feedback and advice. Also a huge thanks to everyone at Bat Cave 2015 and 2016, who helped give shape to this story early on, when it was that idea I kept coming back to.

Lastly, thank you to my family, for all of your support, and for taking this journey beside me.