Robots -- Juvenile fiction. Extraterrestrial beings -- Juvenile fiction. Space warfare -- Juvenile fiction. Adventure stories -- Juvenile fiction. Science fiction -- Juvenile fiction.

Avengers (Fictitious characters) -- Juvenile fiction. Superheroes -- Juvenile fiction. Robots -- Juvenile fiction. Adventure stories. Avengers (Fictitious characters) -- Fiction.

Transformers (Fictitious characters) -- Juvenile fiction. Robots -- Juvenile fiction.

Transformers (Fictitious characters) -- Juvenile fiction. Robot -- Juvenile fiction. Extraterrestrial being -- Juvenile fiction.

Dogs -- Pictorial works -- Juvenile fiction Robots -- Pictorial works -- Juvenile fiction