The books itself does what it says it sets out to do - provide the reader with "off-the-grid" baby names that have never been in the SSN Top 1000. Unfortunately, I didn't realize that this left me with primarily with what I would consider to be unusable names, names used for the non-traditional gender, foreign/ethnic names rarely imported to the US, and odd spellings of names. Perhaps I didn't really understand what sorts of books the name would contain, but I was expecting more unusual, but still recognizable names rather than many that looked made-up.
For example, the first page for boys included a few somewhat usable names like Abilene, Abraxas, Absalom, and Achilles, however, it was overwhelmingly names like Abt, Acker, Agu, Adhil, Adiv etc.
That said, I wouldn't recommend this book unless you want truly strange and mostly unheard of names.