Tower Without a Door - H L MacFarlane - Bog

Eventually, talking to yourself gets a little boring.
After being locked away for twelve years in an enchanted tower, Princess Genevieve finally decides that enough is enough. She'll climb out of the window of the tower and…
And that's where her plan ends. For Genevieve knows nothing of the world - not even the way back to the royal palace and her beloved mother. But when a tired and angry wizard magically appears in the tower just as Genevieve is trying to escape it, she is provided with a very reluctant guide back home.
Julian Thorne has been exploring the world and strengthening his magic for twelve years to avoid coping with the mysterious death of his father. Now shackled with a young woman who claims to be the Princess Genevieve, the wretched wizard becomes embroiled in a conspiracy that may finally give him answers to what happened twelve years ago.
The lives of the two may be far more connected than either of them could have ever imagined.

The third book in the Chronicles of Curses series, The Tower without a Door is an original twist on the tale of Rapunzel. Chronicles of Curses is a series of independent, interconnected fairy tale retellings that can largely be read in any order.
NOTE: The Tower Without a Door is written in UK (British) English, not American English.