In the book, Williams teams up with business leaders, politicians and artists to share thoughts on turning a competitive spirit into success off the court.
Also on Friday, Williams teamed up with Bulls star Derrick Rose to score big with some Chicago Park District campers.
Williams and Rose showed off their skills on both the tennis and basketball courts at Daley Bicentennial Plaza.
The tennis star even attempted a dunk - and only barely came up short.
They also talked to kids about the importance of staying active before inviting the campers to join them in some games.
