This is the 4th book in a series, and it is best to read them in the proper order, so things make sense. The author tells an interesting light hearted tale. There is some fantasy suspension of reality you need to buy into when reading the book. The protagonist is a police officer, and much of the narrative involves "police work", but it feels to me like the author's understanding of police procedure is at a juvenile level.
The purpose of the book is to sell the benefits of nudism, so if you are a fan of that, it creates situations in which nudity is essential to the story, making it a fun light hearted read. I enjoyed all four books in this series.