The Suspicious Red Book: A journey back in time begins the moment you turn the pages.

"Don't turn this page!" How can you read a book without turning the pages? Fifth-grader Dong-cheol discovers a suspicious red book in the school library.
Dong-cheol ignores the warning not to turn the pages and turns the pages, and at that moment, he is sucked into the history book.
When he flips through the red book he finds on the 900 History bookshelf, he finds a strange marking and an unknown four-digit number. Dong-cheol goes to the past indicated by the four-digit number and meets Jang Yeong-sil, Yi Sun-sin, Jeongjo, Kim Man-deok, Jeong Yak-yong, Kim Jeong-ho, and Jeon Bong-jun.
Dong-cheol, who was happier reading books than spending time with friends or family, discovers the importance of family, his own dreams, and what true courage is through talking with historical figures in the red book.


'① Never turn this page! ② Λ and Ω.
If there is a beginning, there is an end, and at the end there is me.
③ Annarasumanara sedu na~ha! ④ Look at the red book shining in your heart.'

The moment you turn the pages of the suspicious red book, a journey into the past begins.
Let's meet another story of great people in history with Dongcheol.

“Foot!”
A small laugh escaped my lips without me knowing.
Because the title of the book, ‘Time Travel’, did not fit with the current trend at all.
Even though we are elementary school students, I just laughed at the author's thoughts when he titled it "Time Travel."
Even as an elementary school student, I knew that actual time travel was not possible.
But the subtitle written underneath is even more impressive.
'Do not turn this page!'
--- p.12

What do you mean 'by chance'?
I am now asking Jang Yeong-sil how this happened.
How could such a stupid question be asked? It's so famous that there's no one in Korea who doesn't know it.
If America has the inventor Edison, it is no exaggeration to say that our country has the inventor Jang Yeong-sil, but how could someone like him be so 'by chance'?
--- p.31

Now it's time to leave here.
What era will we be heading to now? Will I ever be able to return home? I'm anxious.
But even if I wanted to go home, I couldn't.
I can only go back if the red book sends me home.
Anywhere is fine now.
You can go wherever the red book sends you, whether it's home or another era.
Thinking this way made my heart feel much lighter.
I carefully turned the pages to find a glowing page.
--- p.152

Contrary to what I thought, such situations are what move the heart.
In that situation, it's up to me whether to actually take action or to stop and think for a moment.
Depending on how you judge, tomorrow will be different.
In the midst of a difficult life, the temptation of friends coming one by one is difficult to overcome.
At that time, I looked at the red book shining in my heart.
And I hear their voices telling me to be brave.

--- pp.165~166