L. Ron Hubbard 
Sky Crasher 

When Pop starts searching for the story’s source, a professor named Pertwee, he lands in the middle of the story of a century after the Empire State Building, Grant’s Tomb and Grand Central Station all disappear. Apparently, Pertwee’s the mastermind behind it all. But Pop soon discovers that, instead of inventing a new way to blow things up, the professor may be doing quite the opposite.