From the back of the book:
"This tome is the perfect companion to other magic compendiums - after all, who wants to play an arcane spellcaster who only has access to standard spells that everyone else has. With spells and spellcasting rules drawn from the very best of Open Content sources, the Renegade Wizard’s Spellbook is your one-stop shop for arcane power! Sorcerers, Bards and Assassins are equally welcome!
The Renegade Wizard’s Spellbook includes a wide range of arcane spells from a huge range of sources. What They Did Not Teach You At Wizard’s School presents information on a number of enhancements to the magical overview section of your standard magic sourcebook. This is followed by complete Spell Lists for the Renegade Wizard’s Spellbook and over 200 pages of Open Game Content spells from more than sixty print and electronic sources. The Appendix houses all the additional rules such as feats, monster statistics and skills necessary to make full use of the spells provided for you in this collection.
The next arcane spellcaster you play will have a few new tricks with which to surprise both your fellow adventurers and the enemies you face."