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GPCR books
By an Amazon.com customer
Molecular Biology of the CellMolecular Biology of the Cell by Alberts Et Al.
Buy used from: $1.88
Cell Biology Textbook. Good intro into GPCRs
Communication within Animal CellsCommunication within Animal Cells by Greg J. Barritt
Buy new: $132.00 / Used from: $0.84
Different Signal Transduction Pathways. Somewhat outdated
G  Protein-Coupled Receptors (Signal Transduction Series)G Protein-Coupled Receptors (Signal Transduction Series)
Buy new: $195.95 / Used from: $26.23
Specialized book on GPCRs for the pro
The G-Protein Linked Receptor Facts Book (Factsbook)The G-Protein Linked Receptor Facts Book (Factsbook) by Steve Arkinstall
Buy new: $77.79 / Used from: $9.31
All the major GPCRs and subtypes are listed. A great reference.
G Protein Pathways, Part A: Receptors, Volume 343 (Methods in Enzymology)G Protein Pathways, Part A: Receptors, Volume 343 (Methods in Enzymology)
Buy new: $175.00 / Used from: $17.67
Probably the most up-to-date book you can get right now
Identification and Expression of G-Protein Coupled Receptors (Receptor Biochemistry and Methodology)Identification and Expression of G-Protein Coupled Receptors (Receptor Biochemistry and Methodology) by Kevin R. Lynch
Buy used from: $64.99
Good book on methods regarding identification and expression of GPCRs
Regulation of G Protein Coupled Receptor Function and Expression: Receptor Biochemistry and MethodologyRegulation of G Protein Coupled Receptor Function and Expression: Receptor Biochemistry and Methodology by Jeffrey L. Benovic
Buy new: $255.95 / Used from: $45.52
Book on methods to look at regulation of function and expression