This is the 4th book of The Adventures of Danny Hoopenbiller sci-fi series, written by young author David T. Lee. One year after the terrifying invasion of the dinosaurs, Danny settles down. He believes the dinosaurs are long gone. HE IS WRONG. As a result of his trip to the past, the dinosaurs have evolved into a frightening new species. MARTIANS. A prophecy from Thomas Edison deepens the mystery of the oppressors' threat to destroy humankind. The President of the United States (POTUS) unveils a new invention to battle the aliens. Unknowingly, Danny and Jack (his son) rescue Albert...