The Unlucky Girl by Adele Amos

Alice Pinkerton is an average girl who lives in an average house with a white picket fence. While it's true that there have been some misfortunes in her life, including the disappearance of her father after a tragic canoeing accident and her mom's ever-changing love life, Alice has always tried to look on the bright side. And when her mom meets the love of her life, it finally seems like things are about to turn around. Whisked off to a brand new hotel, which houses its very own roller coaster, Alice's reality is about to change and she's about to realize that her world may not be as average as she once thought.