Use a code or invisible ink.
There are many different codes a simple one is to use numbers 1-26 that represent the letters of the alphabet.
Lemon juice can be used as an invisible ink. Write using lemon juice and to read the writing heat the paper (with an iron ) and the writing will appear
The name of the book is 'Secret," it doesn't mean that you cannot know the name of the book.
straightforward; simple
pap
Typography
No, Germany. And Top Secret is the first book name in Holland.
Code
Those hats are called "hidden message hats" or "underbrim hats." The writing under the brim is usually a secret or personal message that is not visible when the hat is worn normally.
secret writing= code
start out with their whole name then use just their last name
"115" by Eliena Siegman.
"But the secret of good writing is to strip every sentence to its cleanest components."
"But the secret of good writing is to strip every sentence to its cleanest components."
"But the secret of good writing is to strip every sentence to its cleanest components."
enigmatic writing/cryptic writing /coded writing
The intro song for "Secret Diary of a Call Girl" is "You Know I'm No Good" by Amy Winehouse.
Secret
The duration of Secret Diary of a Call Girl is 1320.0 seconds.