2014’s Emilie and the Sky World is the second in Martha Wells’ secondary-universe gas-lamp-fantasy Emilie series.
After the stupendous adventures of the first volume, Emilie finally reaches her studious cousin Karthea. Emilie scarcely has time to relate her adventures to Karthea when two complications present themselves. The first is her domineering Uncle Yeric, determined to bring his scandalous niece to heel. The second is a mysterious object in the sky, whose nature is entirely unclear.