Spell Absorption. While holding the book , you have advantage on saving throws against spells. In addition, you can use your reaction when another creature casts a spell that targets only you. If you do, the book absorbs the magic of the spell, canceling its effect.

You can also cast any of the spells on this. 

Notes: Bonus: Magic, Bonus: Spell Attacks, Advantage: Saving Throws, Sorcerer, Warlock, or Wizard, Damage, Control, Detection, Combat, Deception, Warding