From the back of the book:
"This tome is the perfect companion to other magic compendiums - after all, who wants to play a Cleric or Druid 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 Cleric’s Tome is your one-stop shop for ultimate divine power!
The Renegade Cleric’s Tome contains a wide range of divine spells from a huge range of sources. Forbidden Teachings introduces you to the darkest and most secret religious instructions, enhancing your character and subtly changing his devout practices to harness new energies. This is followed by complete Spell Lists for Blackguards, Clerics, Druids, Paladins, Rangers, and a host of Domains. There are more than 200 pages of Open Game Content spells from over 60 print and electronic sources. The Appendix houses all the additional rules, feats and monsters necessary to make full use of the spells in this book.
The next divine spellcaster you play will have a few new tricks with which to surprise both your fellow adventurers and the enemies you face."