A most improper magick - Stephanie Burgis

'I was twelve years
of age when I chopped off my hair, dressed as a boy, and set off to
save my family from impending ruin. I made it almost to the end of my
front garden . . .'Kat Stephenson has just discovered that she's inherited her mother's magical talents, and despite her Stepmama's stern objections, she's determined to learn how to use them. But with her eldest sister Elissa's intended fianc, the sinister Sir Neville, showing a dangerous interest in Kat's magical potential; her other sister, Angeline, wreaking romantic havoc with her own witchcraft; and a highwayman lurking in the forest, even Kat's reckless heroism will be tested to the upmost. If she can learn to control her new powers, will Kat be able to rescue her family and win her sisters their true love?