As a nearly full-fledged member of the Agency, the all-female detective unit based in Miss Scrimshaw's Academy for Girls, Mary Quinn, disguised as a poor apprentice builder, must brave the sinister underworld of Victorian London in order to unmask a murderer.

In 1803, after being exposed as a girl and forced to leave her ship, Jacky Faber finds herself attending school in Boston, where, instead of learning to be a lady, she battles her snobbish classmates, roams the city in search of adventure, and learns to ride a horse.

Aric Athair is dead, but the fight for the Bullet Seas is far from over. Caledonia's nemesis, Lir has seized control of the warlord's army. She and her crew flee to Cloudbreak to prepare for an all-out war. As defecting soldiers begin to show up in droves to join their fight, it seems like the tides might be turning-- until a surprise attack decimates the growing rebellion. Now Caledonia is forced to make an unlikely and unsteady alliance with a new...

In eighteenth-century Europe, Anna "Nannerl" Mozart, a musician whose talent and dedication is overshadowed by that of her gifted younger brother, Wolfgang, struggles to win the notice of her father and patrons who might further her career, despite her gender.