When competition for lucrative prizes ranging from money to placement on the Olympic Team escalates to the point where one desperate participant drugs horses at the River Heights Horse Show, Nancy, Bess, and George track clues to identify the culprit.
When Amy and Dan Cahill's quest to find the million dollars takes them to Japan, they must decide whether or not to enter into an alliance with their uncle, Alastair Oh, whose motives for helping them are extremely questionable.
When Nancy, Bess, and George continue their journey and board a train bound for Denali National Park, they become aware that danger has followed them and Nancy worries her undercover status has been discovered.
In late nineteenth-century London, fourteen-year-old Enola Holmes, much younger sister of detective Sherlock Holmes, turns to Florence Nightingale for help when her investigation into the disappearance of a Crimean War widow grows cold.
"A fictional account of eleven-year-old Viviani Joffre Fedeler, who was born and raised in the New York Public Library, and her older brothers and best friend Eva, who all try and find out if the library is haunted."--