The Marauder’s map in the Harry Potter universe reveals all. Activate the Marauder’s Map with this personalized Harry Potter journal engraved with the spell ‘I Solemnly Swear That I Am Up to No Good’. Just make sure to say ‘Mischief Managed’ when you close this wooden notebook. This personalized Harry Potter notebook is for all the Potterheads out there. This engraved wooden notebook will make the perfect gift for all Harry Potter fans.