I’ve read the first one:
April Blood: Florence and the Plot against the Medici
Lauro Martines
https://www.goodreads.com/book/show/255135.April_Blood
The Pazzi Conspiracy: The Plot Against the Medici
Harold Acton
https://www.goodreads.com/book/show/113164.The_Pazzi_Conspiracy
I wholeheartedly recommend April Blood, and this one, which serves as a sort of dual biography from the Florentine Renaissance:
Fortune is a River:
Leonardo da Vinci and Niccolò Machiavelli’s Magnificent Dream
to Change the Course of Florentine History
Roger D. Masters
https://www.goodreads.com/book/show/472863.Fortune_is_a_River