From the publisher's website:
The cleric has a vital yet complex role within a party: healer, wizard, fighter, and bane of the undead. Divine Favor: The Cleric is an invaluable resource to anyone wanting to play one of the oldest character classes in fantasy roleplaying.
Designed by Stefen Styrsky with additional design by Wolfgang Baur, Divine Favor: The Cleric is the fourth in the Divine Favor series that also covers druid, paladin, inquisitor and oracle. This volume includes:
How to make the most of your cleric
New domains: Alchemy, Apocalypse, and Prophecy
New subdomains: Books, Entropy, Exorcism, Gambling, Horoscope, Lies, Potion, Transmutation, Truth, and Weapons
New cleric archetypes: Ascetic, Charismatic, Enthusiast, Exorcist, Flagellant, Theosophist, Vatic, Weapon-Sworn, Wonder Worker
Variant channeling rules
New spells: Fortune’s Frown, Lucky Break, Lucky Totem, Reading Aid, Manipulate Symbol, Wind Down