From the PerkinElmer web site, a book on the principles of Atomic Absorption.
Link: Concepts, Instrumentation and Techniques in Atomic Absorption Spectrophotometry by Richard D. Beaty and Jack D. Kerber — this is a PDF
Topics include:
Theoretical Concepts and Definitions
Atomic Absorption Instrumentation
Control of Analytical Interferences
High Sensitivity Sampling Systems
Introduction to Graphite Furnace Atomic Absorption
Control of Graphite Furnace Interferences
Alternate Analytical Techniques