The West's Pennsylvania Practice Series (from West/Thomson Reuters) is a useful collection of treatises divided into the following subjects (most titles also available on the library's Westlaw computers):
Pennsylvania Evidence (vol. 1)
Admissibility of Evidence: A Manual for Pennsylvania Trial Lawyers (vol. 1A)
Pennsylvania Criminal Procedure (vols. 2, 2A - also referred to as Rudovsky - title no longer current as discontinued by the publisher)
Pennsylvania Torts (vols. 3, 4)
Pennsylvania Discovery Practice (vol. 5)
Workers' Compensation (vols. 6, 7, 8, 9)
Pennsylvania Driving Under the Influence (vols. 10, 10A)
Trial Handbook for Pennsylvania Lawyers (vol. 11)
Pennsylvania Law of Probation and Parole (vol. 12)
Pennsylvania Rules of the Road (vol. 13)
Criminal Offenses and Defenses in Pennsylvania (vol. 14)
Mortgages in Pennsylvania (vol. 15)
Pennsylvania Criminal Practice (vols. 16, 16A, 16B, 16C - also referred to as Wasserbly)
Pennsylvania Family Law Practice and Procedure (vol. 17)
Pennsylvania Juvenile Delinquency Practice and Procedure (vol. 18 - title no longer current as discontinued by the publisher)
Pennsylvania Probate and Estate Administration (vols. 19, 19A)
Pennsylvania Appellate Practice (vols. 20, 20A, 20B - also referred to as Darlington)
Pennsylvania Motions in Limine (vol. 21)
Pennsylvania Summary Judgment and Related Termination Motions (vol. 22)
Pennsylvania Elements of an Actions (vol. 23 - title no longer current as discontinued by the publisher)
The library may have previous editions. See a librarian for more information.