Sealed with a Secret H.B.

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 from London. The letter includes a "spell" for bringing people closer together: a list of clues leading all through the city. Each stop along the way adds up to magic....