I've read the excerpts in the DM - assuming it's 'The Plot' you're talking about and I thought it sounded quite interesting. I suspect Nadine Dorries and I would disagree on many things politically but I love a bit of political tattle - I also really enjoyed Sasha Swires book.
I don't know much about ND, apart from the fact she is an ex nurse and supports BJ.
The fact she is constantly derided in the press makes me suspicious that someone, somewhere is doing a hatchet job along the lines of 'this middle aged woman is mad and sad etc etc' so ignore her. That alone makes me take notice of what she has to say because ageism and misogyny have been used forever to discredit middle aged women.
TBH even if she is mad/sad it doesn't mean that everything in her book is untrue and for that reason I think I'll give it a go.