The following books may be of interest (I have some if interested):
Popes & Saints –
Barraclough, Geoffrey, The Medieval Papacy.
Chamberlin, E.R., The Bad Popes.
Koman, Alan J., A Who’s Who of Your Ancestral Saints.
Prinz, Joachim, Popes from the Ghetto: a view of medieval Christendom.
Rendina, Claudio (trans. By Paul D. McCusker), The Popes: histories and secrets.
Williams, George L., Papal Genealogy: the families and descendants of the Popes.