From the author of My Secret Guide to Paris and the Charmed Life series comes a new middle-grade novel about sisters, secrets, and everyday magic -- all set in the enchanting streets of London!When Phoebe finds a beautiful antique at a flea market, she's not sure whether it's as valuable as it looks. But inside she discovers something truly amazing a letter written during World War II, from a young girl to her sister who's been evacuated...