Emma Heming Willis is sharing new details about her journey as caregiver for her husband, actor Bruce Willis , who was diagnosed more than two years ago with frontotemporal dementia, known as FTD. Heming Willis, 49, is the author of a new book, "The Unexpected Journey: Finding Strength, Hope and Yourself on the Caregiving Path," out Sept. 9. She told ABC News' Diane Sawyer she hopes the book helps give caregivers a roadmap and not feel as alone as she did when her husband was diagnosed with FTD, a type of dementia that impacts one's personality and ability to communicate and may cause behavioral changes, according to the Centers for Disease Control and Prevention. "I really felt like I was so alone, so isolated, felt like what we were going through as a family, what Bruce was going through

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