From the front cover:
This monk spellbook contains all of the spell-like abilities a monk might learn during their training.
From the back cover:
Contains 19 durable, laminated cards for Monks of any tradition. The perfect supplement to accompany any Monk's collection of abilities.
These cards are included in Martial Powers & Races “Version 3” in the same format as the rest of the Spellbook Cards sets released in 2017.