This thin blue leather tome seems more like a pocketbook then a mystical manual of the ages.

This book has 1d4+1 blank pages inside it. Whilst attuned to the tome any spell you choose to copy into the book no longer needs to be prepared to be cast. If you unattune to the book the pages will become blank once again.  

Notes: Wizard, Druid or Cleric, Buff, Utility