People from outside literature, philosophy, and psychology fields might find it just funny or sexy or a struggle of a liberated women to understand herself. But the book more than that.
The book is the best example of Sartrian idea of existence preceding essence. It's written for someone who knows and has suffered a lot, and yet became such a huge hit. That shows how Erica has been successful in bringing people from outside the above mentioned three areas in her fold.
It's the most delightful and real book I have read in ages.