The Starfinding Spellbook grants you the following features:

ASTROLOGICAL DIVINATION

You are imbued with the guidance and palm reading cantrips as wizard spells.

COSMIC ARCANA

You can add any divination spell to your Starfinding Spellbook.

NEBULA REVELATION

Any ability check you make that relies on sight can't be made with disadvantage while you are in moonlight or if you know the position of the stars in the sky.

STELLAR INSIGHT

You have advantage on ability checks related to cosmology.