‘The third book in Hijin’s secret series, following The Secret of the luminous Clock and The Secret of the Egg No.4! Cookie and Cream are best friends, and they have a cute little choco. Sitting on a bench, they reminisce about the picnic they went on together, but for some reason, Choco is nowhere to be seen. Just then, they spot a stranger approaching from the distance. What secrets are the cookies and cream hiding? A picture book to help little readers understand dementia.