Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An older very good introductory book

This is an excellent,if old book.It has a very gooddiscussion of atomic theory (spin-orbit effect,Hartreeapproximation) which is not covered as well in the newerQuantum Physics(which has many, more modern, applications).It provides a useful introduction to the upper class under-graduate who is iterested in this area.I do atomic physicsresearch and also teach a course in the subject.This bookis part of my library.