Hi - What if the sender actually knew you and your circumstances quite well and was Genuinely trying to assist you and those you are connected to? It could be a "God-send" -
Now you are truly in a position to tell your relatives / JW connections that you have read this book which seems very genuine and non-vitriolic in its content- etc etc and that it has some really eye-opening stuff.
You cant get disfellowshipped for that - although if you are ....lets say in a romantic relationship with the JW... you could risk them telling you to break things off etc. And they may just have a mommy who is not a very lateral thinker and who would go ballistic if her child was being shown diseased apostate stuff etc and if self-same mummy runs off to equally nutty and mentally rancid cousin [still - in ] who feeds her head with a lot of negative shit ....................either the love of your life gets with the picture here or you may be wasting good valuable time in your life and may have to make the heart-breaking decision to move on in life.
Some of the people dialoguing with you - even anonymously - may just have your best interests at heart
Go do some figuring out!
Go well !