From the front cover:
This additional cleric spellbook contains all of the domain spells a cleric is granted by thier chosen deity.
From the back cover:
Contains 43 durable, laminated cards for Clerics of any calling The perfect supplement to complete any Cleric's collection of spells.
These cards are included in Spellbook Cards: Cleric (Version 3) in the same format as the rest of the Spellbook Cards sets released in 2017.