Are aliens are leaving their mark on our world? Irreverent and fun, this book puts skeptical readers to the test with profiles of ten of the more convincing cases involving aliens and their possible visits to our earth. The cheeky, secret-file format makes for a fun, interesting read. Each file lays out the details, identifies the usual suspects, and highlights the most convincing evidence and mysterious facts surrounding the case. Full-color photographs and illustrations help bring each conspiracy file into detailed focus.