The Indestructible Metal Men — Paul Collicutt

There were three Indestructible Metal Men on board the night the Colossus sank, but only one ever made it back to shore. Metal Man Number Two has been at the Robot City Museum since he emerged from the ocean decades ago and hasn't powered up since. But now evil millionaire Mr. Furniss has found one of the other Metal Men at the bottom of the ocean and is planning on using him to build an army of indestructible robots. Can Sarah Cross -- a fiesty young robot scientist -- stop Mr. Furniss before it's too late?