This book was much better than I expected, which makes me happy. I met the author on Goodreads and he sent me a copy to review. It was about aliens in a time where they would travel to earth, and sometimes even vacation there. Earthlings didn't notice the 'trespassers' though because they were merely a different species of human. This was a very interesting take on humans and aliens. The story line was fairly simple. Aliens who were unauthorized came to earth and the secret alien tracking department of the government tracked them and eventually partnered with them to help keep bad aliens off of Earth. There were some love stories in there and a couple of twists and turns, but overall the book was and enjoyable and smooth read with dynamic characters who were unique and likable in their own ways.