From the front cover:
This additional paladin spellbook contains all of the oath spells a paladin needs to follow his chosen path.
From the back cover:
Contains 24 durable, laminated cards for Paladins who have taken their Oath. The perfect supplement to complete any Paladin's collection of spells.
These cards are included in Spellbook Cards: Paladin (Version 3) in the same format as the rest of the Spellbook Cards sets released in 2017.