This is very poorly written, filled with grammatical errors, awkward phrasing, and borderline inaccurate information. It sounds as though potentially written by AI, and definitely by someone who is not an active member of the kink community. If this were your introduction to BDSM practices, then it could be potentially dangerous to simply follow the advice in this book.
Additionally, it is incredibly heteronormative, and even makes assumptions about what roles people will or should assume in BDSM play, though they make references to it being flexible.
Overall, a misleading and technically terrible book. Do not recommend.