From publisher blurb:
Curse of the Moon is a d20 sourcebook about lycanthropes, with a particular focus on a simpler lycanthrope template (with a much smaller level adjustment) and ways of customizing a lycanthrope's abilities. Curse of the Moon provides options for lycanthropes and lycanthrope hunters, with new feats, spells, and magic items focused on the theme of lycanthropy. Rather than delving into specifics of lycanthrope culture, history, and religion, Curse of the Moon focuses on game mechanics, giving new options for this complex and often rules-troublesome group of creatures.
New lycanthrope templates including the simple lycanthrope, fey lycanthrope, and cursed lycanthrope
New feats including Celestial Lycanthrope, Lycanthrope Heir, and feats for animal movement, animal special abilities
New spells
New moon deities, including those from real-world mythology
Variant aversions and vulnerabilities to silver
Alternate alignments for lycanthropes
Effects of the Astral Plane on lycanthropy