"Parkinson's Disease Handbook" If you or someone you know has been diagnosed with Parkinson's disease, you may have a number of questions.What causes Parkinson's? What are the signs and symptoms? What treatments and medications are available? To answer these questions and many more, the American Parkinson Disease Association, Inc. (APDA) is pleased to make our Parkinson's Disease Handbook available to you at no cost. Since our founding in 1961, APDA has been diligently working to Ease the Burden -- Find the Cure for Parkinson’s disease through research, patient and family support, and education. To access your free handbook, complete the short form below and press submit. Click here to return to a listing of all publications. First Name* Last Name* Email* Please send me e-updates with the latest information on Parkinson's Disease.