The "Hunt for the Skinwalker" book is another great book that really delves deep in the paranormal - once again at a US ranch (just like Stardust Ranch book). Although Skinwalkers might not directly be related to UFO's and Aliens, but we felt including this book because of our own beliefs into where the "skinwalkers" actually emerge from - portals...created by ancient Aliens.
The book follows the owners of the ranch's experiences, and the scientific efforts in an attempt to uncover the reason why such occurrences were taking place. During the time at the ranch (before it was 'forcibly sold' to NIDS) a number of different unexplained phenomenon occurred including cattle mutilations and strange creatures that appear and disappear out of nowhere.
The book does seem to jump from subject to subject with no clear direction of "story", and we did feel that photographs of the evidence would really helped back up some of the stories.
We read quite a few reviews of the book prior to reading it ourselves, and many felt incredibly scared by the stories - we did not feel the same. This book is well worth the read though, but would have been much better with some photographs.