It's fine. This book definitely contains some vital information about Kali and how she relates to Abhinavagupta's philosophy, but I would maybe like some more confirmation on the validity of Odier's translation of the Nirrutara Tantra. Also, the author mentions that parts of this book were (supposedly) revealed by Lālitā Devi herself, but then he doesn't label those parts in the actual text. This means that I have no way of knowing which parts are tradition and which parts were from the author's own experiences.