This is the "Secrets of Delicious Food" research notebook, distributed as a bonus at the Kadokomi 2017 Fair. The size is A6. It has not been written in at all, but there is some dirt on the cover due to being left for several years. As shown in the fourth image, it seems to be more of a promotional item with panels from the following manga drawn on it, rather than a notebook: ・Isekai Izakaya "Nobu" ・Today's Menu for the Emiya Family ・Shogimeshi ・Deaimon