High school students -- Fiction. Human-alien encounters -- Fiction.

Teenage boys -- Juvenile fiction. Human-alien encounters -- Juvenile fiction. Extraterrestrial beings -- Juvenile fiction. Life on other planets -- Juvenile fiction. Science fiction.

Teenage boys -- Juvenile fiction. Human-alien encounters -- Juvenile fiction. Extraterrestrial beings -- Juvenile fiction. Slavery -- Juvenile fiction. Machinery -- Juvenile fiction.

Teenage boys -- Juvenile fiction. Human-alien encounters -- Juvenile fiction. Science fiction. Young adult fiction.

Extraterrestrial beings -- Fiction. Human-alien encounters -- Fiction. Alien abduction -- Fiction. Secret service -- Fiction. Science fiction.

Sparks, Jim, 1954- Alien abduction -- United States Human-alien encounters -- United States