Lady Moon

When Celine meets Tomas, they are in a cavern on the moon where she has been languishing for thirty days after being banished by her evil uncle for throwing a scrub brush at his head. Tomas is a charming and eccentric Immortal, hanging out on the moon because he's procrastinating his destiny-meeting, and defeating, Celine's uncle. A pair of magic rings send them back to earth, where Celine insists on returning home and is promptly thrown into the dungeon.
Her uncle, Ignus Umbria, is up to no good, and his latest caper threatens to devour the whole countryside. He doesn't want Celine getting in the way. More than that, he wants to force Tomas into a confrontation-and Tomas, who has fallen in love with Celine, cannot procrastinate any longer. Lady Moon is a fast-paced, humourous adventure in a world populated by mad magicians, walking rosebushes, thieving scullery maids, and other improbable things.
And of course, the most improbable-and magical-thing of all: true love. Rachel Starr Thomson is also the author of Taerith, the Seventh World Trilogy (Worlds Unseen, Burning Light, and Coming Day), and other novels and short stories.