Celebrate the enchantment of the Harry Potter™ films with this lock and key diary that features a classic gold Hogwarts™ crest on the cover, 192 ruled pages, an invisible ink pen to conceal your secret messages and spells, and a lock with two keys to keep your thoughts secure from witches, wizards, and Muggles™. : Write your secrets down with the included invisible ink ballpoint pen and use its magic light to reveal your hidden messages throughout the pages of the diary. : With 192 pages of wide-ruled paper within this diary, you’ll have plenty of room to jot down all your magical discoveries and ideas. : Keep your thoughts and secrets protected with this lockable diary and two companion keys, in case you lose one. : This 5.25 x 6.625–inch journal is a compact size for travel and fits easily in a bag or backpack to take with you on your next spellbinding adventure. : Add more fun Harry Potter™–themed lock and key diaries from Insight Editions to your collection with Harry Potter: Hedwig Squishy Lock & Key Diary, Harry Potter: Wands at the Ready Lock & Key Diary, Harry Potter: Marauder’s Map Lock & Key Diary, and more!