Susan Newman 
My Daddy Has a Brain Cold [EPUB ebook] 

Ariel was a happy, busy seven-year-old when she noticed things changing in her home. As the only girl in the family, she felt it was her duty to find out what was going on and why her dad was beginning to change, sometimes in weird ways. She started asking questions and learned a lot about something called frontotemporal dementia and what it was doing to her once very happy family.