Black Suits from Outer SpaceGene DeWeese
science fiction, young adult
Calvin Willeford and his friend Kathy don't know why the men in black suits keep showing up – but they never thought they'd be hiding a 10-foot hairy monster from outer space – who badly needs their help – from the principal and the police chief, or that they'd fly a spaceship.
Thomas Eugene DeWeese (born 1934) is an American writer of fiction, particularly science fiction but including Gothics, mysteries, romances, suspense, fantasy, and horror; as well as non-fiction books on technology and folk art. He has published as Gene DeWeese and Jean DeWeese; his pseudonyms as a collaborator include Thomas Stratton and Victoria Thomas.
Gene DeWeese. Wikipedia.