Ten-year-old Addie knows that Superheroes aren't real, and that they certainly don't hide out in retirement communities, but she may just have to change her mind. Addie and her mom never stay in one place too long. They've been up and down and all around the country. When her mom, Tish, gets a new job at Happy Valley Village Retirement Community in Pennsylvania, Addie believes they'll be on the road again in a month. But this...