Patricia Wrede

A princess is bored by the goings-on at the castle but finds adventure with dragons when she runs away. She willingly becomes the captive of Kazul, a grumpy but good-hearted dragon, and the two of them save the other dragons from mean-spirited wizards. Sequels are equally light and engaging and include: Searching for Dragons, Calling on Dragons, and Talking to Dragons.

A four-book series featuring reluctant princess Cimorene, warring factions of dragons and wizards, and tons of humor.