PHILADELPHIA (WPVI) -- Alzheimer's disease is the most common form of dementia and the number of Americans living with it is growing fast.

According to the Alzheimer's Association , right now more than 7 million Americans have Alzheimer's and that figure is expected to grow to 13 million by the year 2050.

So now a local daughter and nurse is trying to help families navigate this terrible disease with a new guidebook she's written. It's called "Navigating Alzheimer's: A Roadmap to Taking Charge" .

Melanie Cutillo writes in her book: "I had known this day might come, yet nothing prepared me for the wave of emotion that swept over me."

That day was when her father forgot her name.

Melanie writes: "His world grew foggy with the shadows of Alzheimer's. I resolved to become his guidin

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