I believe that everyone has seen it in TV dramas and movies. Often the protagonist's pistol will be hidden in a book, but in real life, why didn't anyone think of hiding pens in his notebook?
Is there often someone who needs to make a record when there is only a notebook but no pen? At this time, a notebook with a hidden pen will help you. The pen in the notebook is a necessity for the user to find it in time when using the notebook.
With it, you don't have to worry about finding a pen when you record something in your notebook. I think this notebook can also be used for other purposes, such as making a suprise prop, hiding the wedding ring, necklace, or something.
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