Your secrets don't have to be locked away in a vault, hide them in plain sight with this book safe.
You may think that secrets must be put in a place where other spies can't get to, such as a big safe or something like that. But the problem with that is that a safe is known for holding valuables, and crooks know this too!
Sometimes it's better to hide your secrets in plain sight. For this you can modify a regular (hard cover) book to be a great hiding place. It may not be as well protected as in a safe, but the upside is that other spies won't know where to look for it!
What you need to make a book safe:
Here's what to do to turn a book into a hiding place. We are going to cut a hole in a number of pages, creating a space where you can hide your stuff...
With the pencil and ruler, draw a rectangle on the right page. Don't draw to close to the edge of the page!
Now we're going to cut into the book. Cutting is done with a sharp knife and should be done by an adult! Put the ruler on one edge of the drawn rectangle, and cut through the pages with the knife against the ruler. Watch your fingers! Don't cut all the way to the edge of the page, and don't to deep, as it's difficult to cut, plus you can skip the pages you just cut, and cut deeper from that point on.
After you have cut rectangles out of the pages you wanted, you'll have a void in the book that looks like this:
Some like to glue the cut pages together with wallpaper paste, but I'm no big fan of that. It's messy, and in my opinion it's not needed to hide your stuff.
Here's a great video explanation by a fellow spy and helper, SolarSpy. Congrats on a job well done, Solar!