In his fifties, Michael Gates Gill had it all: a big house, a loving family, and a six-figure salary. By sixty, he had lost everything: downsized at work, divorced at home, and diagnosed with a slow-growing brain tumor, Gill had no money, no insurance, and no prospects. He took a job at Starbucks, and for the first time in his life, he was a minority--the only older white guy working with a team of young African-Americans. He was forced to acknowledge...