Jane, unlimited / Kristin Cashore.

Enhanced descriptions from Syndetics:

Jane has lived a mostly ordinary life, raised by her recently deceased aunt Magnolia, whom she counted on to turn life into an adventure. Without Aunt Magnolia, Jane is lost. So she's easily swept away when a glamorous, capricious, and wealthy acquaintance from years ago asks Jane to accompany her to a gala at the extravagant island mansion called Tu Reviens.

Jane remembers her aunt telling her- "If anyone ever invites to you to Tu Reviens, promise me that you'll go." What Jane doesn't know is that the house will offer her five choices that could ultimately determine the course of her life.

One choice leads Jane into a heist mystery. Another takes her into a spy thriller. She finds herself in a gothic horror story, a space opera, and an extraordinary fantasy realm. She might fall in love, she might lose her life, she might come face-to-face with herself. Every choice comes with a price. But together, all the choices will lead her to the truth.

Read Jane, Unlimited and remember why The New York Times has raved, "Some authors can tell a good story; some can write well. Cashore is one of the rare novelists who do both."