Five books where girls disguise themselves as boys

Gail Carriger writes comedic steampunk mixed with urbane fantasy in three series: 2 adult, the Parasol Protectorate and the Custard Protocol, and 1 YA, the Finishing School series. Her newest book ends the Finishing School series and is called Manners & Mutiny. Her books are published in 18 different languages. She has 12 New York Times bestsellers via 7 different lists (including #1 in Manga