This is such an amazing book. Granted you must have an interest in the genre to think that but, I like a good conspiracy. I do have to admit this was a fast listen. This books is just under 8 hours long so it is possible to listen to it in one day, which I easily did. However, this is a book that you will have to listen to more than one. In fact, this is the first book for this year that I will put right back on my TBR shelf and will start this over tomorrow. So who is this book for I have to say this book is probably the best introduction book that has been written for this topic. If you have ever had an interest in anything related to Aliens then you have to read this book.