A Renaissance Court: Milan under Galleazzo Maria Sforza by Gregory Lubkin, published by University of California Press, Berkley, 1994.
If you want to know more about the Italian court that produced some of the earliest and the most beautiful tarot decks in history, this book is the best place to go for a well rounded view of daily life, politics, intrigue, relationships, philosophy, and just about anything else you might want to know about this Sforza and his court. This book does not address tarot cards directly but describes in some detail the courtly life.
There is one reference to tarot cards as a form of recreation. Cards were played by both women and men at the court. The duke himself is known to have played cards. In particular, it pleased him to gamble heavily playing triumphi with a tarot deck. This seemed to have been done especially around Christmas. Few people at court had enough financial resources to match his wagers, and he was serious enough about gambling that he once commanded that everyone present join him in gambling and was known to offer money to entice people to play.