Trouble on planet Earth / Montgomery, R. A

The reader investigates the dwindling oil supply that threatens life on Earth and can choose between alternative adventures, each leading to twenty-two possible endings.

The reader investigates the dwindling oil supply that threatens life on Earth and can choose between alternative adventures, each leading to twenty-two possible endings.

You and your brother Ned have just taken on your toughest case: finding out why every drop of oil in the world has disappeared.