The Memory Thief by Jodi Lynn Anderson

Twelve-year-old Rosie Oaks’s mom is missing whatever it is that makes mothers love their daughters. All her life, Rosie has known this…and turned to stories for comfort. Then, on the night Rosie decides to throw her stories away forever, an invisible ally helps her discover the Witch Hunter’s Guide to the Universe, a book that claims that all of the evil in the world stems from thirteen witches who are unseen…but also unstoppable. One of these witches—the Memory Thief—holds an insidious power to steal our most precious treasures: our memories. And it is this witch who has cursed Rosie’s mother.

In her quest to save her mom—and with her wild, loyal friend “Germ” by her side… Read more.