Mimi and her cat Marvin must adjust to life with an unexpected new neighbor in this hilarious, quirky, and heartwarming start to a brand-new illustrated chapter book series. Mimi and her cat Marvin live in the Periwinkle Tower apartment building with their friends Yoshi and Tonya. When they learn that someone new is moving into the building just before Thanksgiving, Mimi hopes it will be a girl just like her to share all of her hobbies and adventures. But the new neighbor turns out to be a boy named Boris, and he is not what Mimi envisioned at all. By Christmas, things have gone from iffy to bad to worse. Will life in the Periwinkle Tower ever be as fabulous as it was before?