A Snicketesque girl-power adventure featuring Ada Lovelace and Mary Shelley at 11 and 14 in 1826 London, for ages 8-12...
"London 1826: The Advent of the Steam Age
11 year old Ada has a problem: her governess, Miss Coverlet, has quit her job to go get married (a dumb idea if ever there was one, if you ask Ada) and her new tutor Percy ("Peebs") is a total drip.
She'd rather be left to her own devices – literally – inventing things and solving math problems and ignoring people altogether.
She's also forced to study alongside the imaginative girlie-girl Mary, who's always going on about romance and exotic travels. Fortunately, Mary's appetite for adventure leads her to propose the two girls open a detective agency, and when an heiress shows up with a case about a missing diamond, it's the perfect puzzle to coax Ada out of her shell.
This is the made up story about two very real girls – Ada, the world's first computer programmer, and Mary, the world's first science fiction author – caught up in a steampunk world of hot-air balloons and steam engines, jewel thieves and mechanical contraptions.