The Story Before the Adventures of Tommy Dawson and the Magic Bike by Jim Derby

It's 1937 and a young boy named, Johnny Dawson, who lives in a small town in Indiana, possesses something he doesn't know he has; it's something the Nazis desperately want in order to conquer the world. So, the Nazis send Count Victor Zarnoff, the World's Greatest Hypnotist and Ring Master of the Count Victor Zarnoff World Famous Circus, along with his henchman, Boris Landvil, the World's Strongest Clown, who has brought his Army of clowns, and Doctor Adolf Kleinmann, who brought his six Doberman Pinschers. All of them are intent on getting what Johnny Dawson doesn't know he has. Fortunately, Johnny Dawson is going to have a witch, the World's Greatest Knife Thrower, and her father, the World's Foremost Authority on Time Travel, as allies. With their help, he'll be able to send Zarnoff and his cohorts into a fifty year time vacuum. But those fifty years have come and gone, and now Count Zarnoff, along with his cohorts, are back and they're closing in on John Dawson. So he's going to have to disappear. But before he does, he'll need to tell his Grandson, Tommy Dawson, The Story (his story), because Tommy will need to know what happened during that July in 1937, in that small town in Indiana, because he's going to have to find that Time Machine and destroy it, before Count Zarnoff gets his hands on it and changes History.