LANGE Series has many good titles....
You can type in LANGE in OneSearch or the Classic Catalog and get title choices from this series.
There are multiple areas that cover material important to a physician assistant, here are a few keys areas:
W 21.5 -- Physician Assistant Profession
W 62 -- Interpersonal Relations w/patients
WB 200 -- Physical Diagnosis
USE the NLM Call Number Chart on side of rows.
Some other areas --
WG -- Heart
WO -- Surgery
WM -- Pychology/Psychiatry