From the back of the book:
An ARCANE SOURCEBOOK by MONTE COOK
The Complete Book of Eldritch Might also contains a variant bard and sorcerer class, hundreds of spells, and dozens of feats, prestige classes, magic items, and creatures. Also included are seven fully detailed magical locations, rules for starlight magic, spellsongs, frozen dreams, magical constructs, and handy guidelines for using Eldritch Might with your Monte Cook’s Arcana Evolved variant player’s handbook.
This book compiles all the rules and source material previously published as The Book of Eldritch Might (Second Edition), Book of Eldritch Might II: Songs & Souls of Power (Second Edition): Songs and Souls of Power, and Book of Eldritch Might III: The Nexus. All the rules material has been updated to v. 3.5 of the d20 System. Now eldritch power is yours to command!