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

Ability -- Juvenile fiction. Survival -- Juvenile fiction. Brothers and sisters -- Juvenile fiction. Ability -- Fiction. Survival -- Fiction.

Adventure and adventurers -- Fiction. Brothers and sisters -- Fiction. Protest movements -- Fiction. Political activists -- Fiction. Science fiction.

Ability -- Juvenile fiction. Survival -- Juvenile fiction. Brothers and sisters -- Juvenile fiction. Science fiction. Young adult fiction.

Twins -- Juvenile fiction. Brothers and sisters -- Juvenile fiction. Kings and rulers -- Assassination -- Juvenile fiction. Kings and rulers -- Succession -- Juvenile fiction. Competition -- Juvenile fiction.

Environmental degradation -- Fiction. Magic -- Fiction. Dragons -- Fiction. Brothers and sisters -- Fiction. War -- Fiction.

Fugitives from justice -- Fiction. Criminals -- Fiction. Soldiers -- Fiction. War -- Fiction. Brothers and sisters -- Fiction.

Time travel -- Juvenile fiction. Good and evil -- Juvenile fiction Space and time -- Juvenile fiction. Brothers and sisters -- Juvenile fiction. Science fiction.

Brothers and sisters -- Fiction. Genetic engineering -- Fiction. War games -- Fiction. Science fiction, American. Science fiction.