Least expensive:
Schaum's Outline Electrical Power Systems & Schaum's Electric Machinery.
Expensive: (check eBay for used and older versions which are just as good)
Power System Analysis (Grainger/Stevenson) & Electrical Machines, Drives and Power systems (Theodore Wildi)
Here is my booklist..
AM BREADTH
EERM - Probobly the best "Breadth" book out there.
Fundamentals of EE (By Bobrow) - Goes into the "depth" of the AM stuff that EERM does not, so it complements it perfectly. More than you'll care to know.
NCEES Electrical and Computer Study Guide
Schaum's Basic EE (or similar Schaums, there's 3 or 4)
One good text on Electronics (transistors, Op Amps), one Communications (basic) and one Digital (binary, hex, chips, micro, clock cycles, K-map).
EE Quick Reference (other board or Kaplan's Referenced Review by Bentley)
PM Power Depth
Power Systems Analysis (Grainger)
Electric Machines, Drives and Power Systems (Wildi)
Schaum's Electric Power Systems & Schaum's Electric Machinery
NEC Code for Code questions.
"Public Lighting" & "IESNA Illumination Handbook" for lighting questions.
I also printed and bound lots of stuff from Wikipedia ranging from DC motors, Generators, Computers, load flow, etc.