This is the second of Green Ronin's Advanced Rulebooks for the d20 System, THE essential supplements of 2004. The Advanced Player's Manual complements the Player's Handbook with new options and abilities. Enhance your d20 fantasy game with luck rules, a new dynamic alignment system, expanded benchmarks for skills, alternate spellcasting classes and scores of supporting new spells, unit combat rules, culturally-based variants for racial abilities, and a whole lot more. Written by D&D 3E and Draconomicon author Skip Williams, the Advanced Player's Manual has something for everyone. If you buy only one sourcebook for the d20 System, this should be the one.