When you buy a physical book, and you love it, you pass it along to friends and family members who might glean some of the same happiness, or sadness, or wonder, that you had when you read it.

Tina Knowles launched her nine-city book tour, "Matriarch: An Evening with Tina Knowles, Family and Friends," on April 30. The event featured special guests like Michelle Obama and Ledisi ...