Gift from the Stars

When disillusioned aerospace engineer Adrian Mast buys a book at a
remainder sale, the last things he expects to find in its appendix are
alien spacecraft designs. With the help of the bookstore owner, Adrian
tracks down the author—only to find him in a mental institution
anguishing over the intentions of the aliens who sent the designs to
him. By bluffing a bureaucrat intent on thwarting their progress, the
two friends continue their quest for the stars and go ahead with the
spacecraft designs. Having successfully launched their ship 15 years
later, the questions that remain are: What were the intentions of the
aliens? and Is mankind ready to face what's out there?