[madbadgalaxyman (Robert)]

Here is my quick Book Review of Gray and Corbally, from my recent science forum thread on Stellar Evolution books:

"Stellar Spectral Classification", 2009, by Richard O. Gray and Christopher J. Corbally, Princeton Series in Astrophysics, Princeton University Press, ISBN 9780691125114

This book is literally "The Bible" of stellar spectra and stellar spectral classification. This massive and comprehensive and scholarly work is an essential reference for all optical and near-infrared astronomers. This book explains the current iteration of the standard MK System of Classification of the spectra of stars, and it contains a comprehensive collection of stellar spectra , with detailed explanatory information on the many stellar types, including spectra and explanations of most of the recently-discovered stellar and sub-stellar types (e.g. the L & T dwarf classes, and brown dwarfs). Extreme and rare stars like O2/O3 stars and Wolf-Rayets and LBVs get a much greater coverage than in earlier references, reflecting today's greater knowledge of these "superstars". This work somewhat resembles a supercharged and super-extended version of Kaler's popular-level book on Stellar Spectra.....and it is much more up-to-date! Because the Spectral Classification of Stars does not have to involve lots of hairy physics and mathematics, this is an area of professional astronomy in which amateur astronomers can become highly competent.

Reviewer's note:
This is not intended to be a comprehensive review. But it does describe the book accurately.