Found in Space, But Who Are You? Book 13

Alexandra Cisneros called, and she sounded more stressed than I have ever experienced. "I realize that you folks have only found 1 inhabitable planet plus 1 planet that could become good friends, but it's time for you folks to return to Earth," she said, "Something has come up, and I need you for a mission like you have never been on before. Special preparations need to be made! An alien landed near Washington D.C. on a mission to study humans, and we really need your help dealing with him!"