There are a lot of books on the Philly Mob.

The Boardwalk Jungle covers the 70's and 80's mob families in Atlantic City (Philly/NJ/NY) as well as political and business corruption of that time that was both related to/independent of the mob.

The Goodfella Tapes covers Stanfa's era as boss.
The Last Gangster is centered on Ron Previte and the Stanfa/Merlino era.
The Plumber is centered around the Scarfo era.
Blood Oath also details the Scarfo era and transition.
To a varying degree I think these are all worthwhile. They all have slightly different perspectives of course.