My Imaginary Mary by Cynthia Hand

It’s aliiiiiiiive! The bestselling authors of My Lady Jane are back with the electric, poetic, and (almost) historical tale of the one and only Mary Shelley.

Mary may have inherited the brilliant mind of her late mother, Mary Wollstonecraft, but she lives a drab life above her father’s bookstore, waiting for an extraordinary idea that’ll inspire a work worthy of her parentage—and impress her rakishly handsome (and super-secret) beau, Percy Shelley.

Ada Lovelace knows a thing or two about superstar parents, what with her dad being Lord Byron. But her passions lie beyond the arts—in mechanical engineering, to be exact. Alas, no matter how precise Ada’s calculations, there’s always a man willing to claim her ingenious ideas as his own.

When fate (er, fae) connects our two masterminds, they learn their talents are rare indeed—because their parents were two of the most powerful fae to have ever lived. And with the right training from a fae godmother, they can achieve anything they dare to imagine. But when their dream team accidentally-on-purpose results in a living, breathing, thinking automaton, Mary and Ada face a villain of Gothic proportions. . . .

With comic genius and a truly electrifying sense of adventure, Cynthia Hand, Brodi Ashton, and Jodi Meadows continue their campaign to turn history on its head in this YA fantasy that’s perfect for fans of The Princess Bride and A Gentleman’s Guide to Vice and Virtue.
 
- Goodreads Summary