Happily Ever Witch by Cassandra Gannon

Esmeralda the wicked witch is having a lousy week. She’s fallen through a rabbit hole and landed in Wonderland, a cheerful, tea-partying place that no self-respecting villain ever wants to visit. People are threatening to chop off her head, unless she wakes up a sleeping dragon with True Love’s kiss.
And not just any dragon.
Trevelyan, Last of the Green Dragons is the worst villain in the world and the sworn enemy of her chosen family. The guy is 98% Bad and 100% sure that Esmeralda now belongs to him. Soon, she’s locked an enchanted castle with the smirking maniac. If she doesn’t find a way out of this whimsical hellhole soon, Esmeralda will turn that sexy, disagreeable man into a frog. …Just as soon as she’s done falling in love with him.