pdrecovery.org
She has written myriad books, nearly all of which are available for free on her website. Start with "Recovery From Parkinsons."
I have no idea if what she says is true. I will be totally honest with you, however, it's hard to believe that she would write numerous books that are multiple hundreds of pages and give them away for free in a situation where she was lying. I mean that's a lot of effort. I'm not a conspiracy theorist, but a lot of what she says makes sense. With that in mind, the Parkinsons Personality she describes fits exactly my dad, who has Parkinsons.