Be careful what you wish for.Becca, who lives on New York City's Upper West Side, is planning a sleepover for her 10th birthday. But her best, and only, friend, Harper, seems uninterested, admitting that she has a new best friend. After the two have a falling out, Becca is truly friendless. Everything changes when she receives a mysterious box containing a magic bracelet with a poem saying that the bracelet will ease her sadness and will provide a single wish. She is instructed to mail the bracelet forward when it is no longer needed. Becca wishes everyone wanted to be her pal, and almost immediately, kids are talking to her, complimenting her, and inviting her to sit with them at lunch. It all seems wonderful but soon gets out of hand. She now wants the bracelet off. But it's not so easy. Becca narrates her story via a letter to an unknown Addie Asante, describing in meticulous detail her adventures in the realm of magic, holding nothing back as she questions events, eventually finding new understanding and new friends. Becca is Jewish and depicted as light-skinned in Vee's black-and-white illustrations; she seamlessly includes descriptions of family traditions. Harper is cued South Asian. Readers will love Becca for her humor, honesty, kindness, and insecurities. Many mysteries remain unsolved, but Addie is to be the next recipient of the box and probably the hero of the next book in this new series.A coming-of-age tale told with humor, compassion, and more than a touch of magic. (Fantasy. 8-11)