"Families." . . "Best friends Juvenile fiction." . . "JUVENILE FICTION/Social Situations/Friendship/" . . "Best friends." . . "JUVENILE FICTION/Love & Romance/" . . "Friendship Juvenile fiction." . . "Friendship." . . "Brothers and sisters." . . "Best friends Fiction." . . "Iowa" . . "Iowa." . "JUVENILE FICTION/Paranormal/" . . "Twins Juvenile fiction." . . "JUVENILE FICTION/Action & Adventure/" . . "Family life Iowa Fiction." . . "Paranormal fiction." . . "Brothers and sisters Fiction." . . "JUVENILE FICTION/Family/Siblings/" . . "Supernatural Fiction." . . . . . . "Fiction"@en . "Fiction" . . . "History" . . . "In 1963, when twins Henry and Helen and their best friends, Alan and Nicki, try to find Alan's missing brother, Carl, they stumble into the knowledge of their \"subtle forms\" that can separate from their physical bodies, and into a criminal's plot to make himself immortal--at any expense."@en . "In 1963, when twins Henry and Helen and their best friends, Alan and Nicki, try to find Alan's missing brother, Carl, they stumble into the knowledge of their \"subtle forms\" that can separate from their physical bodies, and into a criminal's plot to make himself immortal--at any expense." . "Juvenile works"@en . "Juvenile works" . . "The trap"@en . "The trap" . . . . . . . . . . . . . . . . . . . . . . . "Electronic books"@en . "JUVENILE FICTION/Science Fiction, Fantasy, Magic/" . . "Friendship Fiction." . . "Families Iowa Juvenile fiction." . . "JUVENILE FICTION/Science Fiction/" . . "Brothers and sisters Juvenile fiction." . . "Twins Fiction." . . . . "1900 - 1999" . . "Twins." . .