This is a topic that most people wish to avoid since it is unpleasant to think about a loved-one or even ourselves having to deal with Alzheimer's Disease.
The first step to dealing with a disease is get a basic understanding of it. The Alzheimer's Association has a page titled "What Is Alzheimer's?" Besides the basic information, there are plenty of links to other sources of information.
Of course, you can always visit the Library to borrow one of our books on the topic in the 616.831 section. There are, also, many first-hand accounts of sufferers with the disease and their caretakers.
We also have DVDs for those who prefer to view rather than read. Look for Caring for a Loved One With Alzheimer's: An Emotional Journey [DVD 616.831 CAR], The Forgetting: A Portrait of Alzheimer's [DVD 616.831 FOR], and Glen Campbell: I'll Be Me [DVD 782.42 GLE].