15-16th century Italian history

Hi guys! I’m about to finish ‘The Medici’ by Mary Hollingsworth. The book is splendid, I enjoy it greatly, espexially the chapters talking about the 15-16th century. Right now I’m looking for non-fiction books to read further about the Italian history in that era. I’m especially interested in the big houses like Sforza, Della Rovere and etc. I’m also interested the papal elections, and the political war between european emperors to take Italy.