The Infinite Lives of Maisie Day

As in Madeleine L'Engle's A Wrinkle in Time, math and science inform this mind-bending mystery about a girl who must work with the laws of the universe and trust the love of her family if she is to set her world right. It's the morning of Maisie's tenth birthday, and she can't wait to open her presents. Maisie is not a typical kid. What she wants most for her birthday are the things she needs to build her own nuclear reactor. But she wakes to an empty house, and outside the front door is nothing