If you are interested in cryptozoology and the unexplained, then this is a book that you will find interesting. The book covers the investigation of the numerous sightings of a flying humanoid creature, known as the Mothman, in the Chicago/Lake Michigan area.
The book provides countless witness reports of these creatures. The reports are arranged in a timeline fashion, providing a somewhat shocking fact that these are not just recent occurrences. The author also provides an analysis of the witness reports. One important feature of his analysis is that he explains some of the sightings are probably things such as misidentified birds. However, he cannot so easily explain most of the sightings. It seems that something strange is flying around the Lake Michigan area.
These sightings are well-documented and plentiful in the book. However, at times, I found myself skimming over parts of the book as the reports became a little repetitive.
However, I recommend this book to anyone interested in the investigation of unexplained phenomena.