For carers 
The comfort of home for Parkinson's disease: a guide for caregivers
Authors: Maria M Meyer, Paula Derr, and Susan C Imke
Publisher: Care Trust Publications. 2007
ISBN: 0966476778
A practical hands-on guide that provides information to help carers through all stages of PD.
The complete carer's guide
Author: Bridget McCall
Publisher: Sheldon Press. 2007
ISBN: 0859699951
A good general practical guide to caring, including what it involves, the issues affecting carers, and sources of help.