1915. A young British boy and his father take in a lost girl, who the villagers suspect may be German. May, 1915. Alfie and his fisherman father find a girl on an uninhabited island in the Scillies-- injured, thirsty, lost-- and with absolutely no memory of who she is, or how she came to be there. She can say only one word: Lucy. Is she a mermaid, the victim of a German U-boat, or even, as some islanders suggest, a German spy? Only one thing is for...

While traveling to England with his mother and great-aunt on the ocean liner Lusitania in 1911, thirteen-year-old Nate, delighted to find that the Houdinis are also on board, finds himself involved in another dangerous adventure as he and Houdini try to find the man responsible for attempting to assassinate another passenger--President Theodore Roosevelt.