This is book number 1 in the Ruby Redfort series.
“Thirteen-year-old Ruby has her own sense of style, loves watching TV detective shows, and just happens to be an expert puzzle solver and code breaker. So far, she has filled 622 yellow notebooks with her keen observations. As the town of Twinford awaits the arrival of a gold bullion shipment and the treasured Jade Buddha of Khotan, Ruby's house is mysteriously emptied of its contents and her housekeeper disappears. A series of cryptic clues soon leads Ruby to a top-secret assignment in this brilliant mystery filled with loads of humor and suspense.”
— Joyce Tiber, Next Chapter Bookshop, Mequon, WI