Call Spell Book

You touch a spell book. Until you decide to make another spell book your summonable spell book, you can summon or dismiss your spell book as an action or a bonus action. While dismissed, your spell book goes into a dimension, and you spell book can't be accessed in any way besides you summoning it. While your spell book is dismissed, you cannot add or remove spells that are in it, and you cannot change your prepared spells.