What's the Name of That Book??? discussion

This topic is about
The Runaway Princess
SOLVED: Children's/YA
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SOLVED. Children's Book - Princess is locked in a tower by her Uncle/male relation. She escapes during a party and finds a mentor-type and his apprentice in a village. Travels with the two to a different kingdom to get help to overthrow her uncle. [s]
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The book had an ambiguous medieval setting, no magic. The cover of the book I owned was pink, and I believe it had the princess on it. I read this sometime in the late 2000s, possibly early 2010s but unlikely. The book seemed new.
Thanks in advance for the help!