[Children Who Read This Book for the First Time]
The content is genuine, and the story is crisp and clean, making it a great fairy tale. The fantasy elements like talking cats and underground prisons are very interesting. The protagonists are as normal as the friends you can see in school, so reading this book feels more realistic. Moreover, the math problems are not difficult and are well integrated into the story, which allow them to be solved naturally.
- The First Child to Escape from the Math Prison, Ryu Si-hoon

Most math books are either stuffed with concepts or not very interesting even if they have stories. But the story and math concepts in this book are very naturally connected. The concepts and problems presented in the book are neither too difficult nor too easy, and they are diverse, making the book more interesting.
- The First Child to Escape from the Math Prison, Park Si-ho

I usually enjoy reading math fairy tale books, so I found this book is very interesting to read. Compared to other books, its problems are more interesting, especially not memorizing problem types but teaching the way of thinking to solve problems, which is great. Thinking is more interesting than memorizing problem types.
- The First Child to Escape from the Math Prison, Kim Geon-hee

I read it happily and learned new math concepts, and even difficult problems can be solved more easily, which is great. I think that friends who are not interested in math or are interested but find math difficult, if they read this book, their confidence will be enhanced.
- The First Child to Escape from the Math Prison, Kwon Min-kyung

[Parents Who Read This Book for the First Time]
Seeing Min-kyung being curious and happy about the next story while reading, I am very satisfied. Even when encountering some difficult concepts, she would first think deeply, read the explanations, and ask questions. Although she did not solve all the problems, I think she can learn math better by finding methods on her own.
- A Mother Who Escape from the Math Prison Together, Min Young-ae

This book can stimulate children's intelligence. Once you start reading, it will deeply attract you and make you reluctant to put it down. It has a well-structured and captivating story framework, providing an opportunity to think deeply about math concepts that are often difficult to simply explain in daily life. Following the "math inept" Young-il and his friends, the members of the Math Discovery Club, you will experience an exciting adventure. The scenes of them solving problems in the math prison are not only impressive but also show the practical application of math and the power of problem-solving. This book not only helps readers understand math principles but also guides them to experience the deeper joy of math, opening up a new perspective and making math lively and interesting.
- A Mother Who Escape from the Math Prison Together, Oh Sun-ok

Although there are many children's math fairy tale books on the market, there is a relative lack of math stories designed specifically for elementary school students, especially those in the middle and higher grades. This book fills this gap and has become an excellent work suitable for elementary school students to explore and expand on math principles and concepts in depth. It tells how Young-il and his friends discover the charm of math and naturally immerse themselves in the world of math in the story.
This book is not only suitable for children to read independently but also very suitable for parents and children to read together and share the joy of learning. It encourages children to understand and master math knowledge at their own pace, and eventually, like Young-il, grow from a self-proclaimed "math incompetent" to a "escapee" who can confidently solve math problems. Through reading this book, children will gain confidence.
- A Mother Who Escape from the Math Prison Together, Kang Jung-ok

[YES24 Book Website MD, Math Scholar Expert]
"The Way Children Learn Mathematics Well," a treasure of elementary school mathematics, was created by teacher Ryu Seung-jae, and now he leads us again in the form of his first math fairy tale. In this work, through the adventure story of Young-il and his math exploration partners, the author skillfully shows how to cultivate mathematical thinking and problem-solving skills. The children think independently, discuss together, solve complex problems, and finally achieve escape from the prison. This is not only a fun math journey but also a profound awakening to our understanding and recognition of the essence of mathematical thinking.
- Children's Book PD Park Eun-young

South Korean students rank among the top in the world in mathematical ability, but there are not many students who truly love and cherish mathematics. The reason they are good at solving problems is often because they are forced to solve a large number of problems, not out of inner pleasure. This mechanized problem-solving ability is likely to be replaced by artificial intelligence in the near future. However, if you can enjoy the process of independent thinking and cultivate real thinking skills, you will not only discover a fun world of mathematics but also make your future brighter. As shown in the book "Children in the Strange Math Prison," finding a way to solve problems through your own efforts, sometimes with the help of friends, is the key to cultivate this ability.
- Professor Choi Young-gi (Professor in the Department of Mathematics Education at Seoul National University, author of "This Kind of Mathematics for the First Time")

★ Traditional Chinese Copyright has been sold!
★ "Multiplication and properties of equations can be learned by riding a bicycle?" "Fractions can be learned by cutting pizza?" There are also cats that can speaking, candy fish that eat plastic foam... No need to memorize formulas, a set of math fairy tale books that you can't help but read to the last page!
★ Author Ryu Seung-jae has 26 years of experience of teaching mathematics. His work "The Way Children Learn Mathematics Well" is regarded as the Korean Bible of mathematics learning and is famous for its innovative teaching methods.
★ Recommended by Professor Choi Young-gi, the author of the math bestseller "This Kind of Mathematics for the First Time" and a professor in the Department of Mathematics Education at Seoul National University!
★ Highly recommended by many young readers and parents!
★ Recommended by Lee Sang-yeol, the operator of the "Lee Sang-yeol Mathematics" YouTube channel with 100,000 subscribers!
★ Mathematics in life, linked with elementary school mathematics curriculum. Cultivate children's ability to think independently and solve problems, laying the foundation for future learning and life.

"The Learning Children, The Growing Children " Series consists of 12 books:
"Children Who Pay Taxes 1"
"Children Who Pay Taxes 2"
"The Self-Learning Children"
"The Children Who Love Vegetables and Fruits"
"The Children Who Love Reading"
"The Children of the Science Detective Class"
"The Children of the Curious Math Prison"
"The Children of the Curious Math Cave"
"The Children Who Can Read Facial Expressions"
"The Children Who Develop Reading Comprehension"
"The Children Trapped in the Strange English Country"
"The Children Who Speak Confidently and Kindly"

"Children Who Escape from the Math Prison"
The protagonist, Young-il, who originally considered himself as a "math incompetent", encounters a uniquely styled, afro-haired teacher and a group of children passionate about exploring the "Math Discovery" club after transferring to a new school. Together, they embark on a wonderful journey to explore the principles of mathematics in daily life. Gradually understanding the beauty of mathematics, they discover a mysterious "Master Pharmacy" basement. However, this discovery leads them into an unexpected predicament - they are trapped in a prison filled with mathematical puzzles. It is from this moment that the real adventure of the five children begins.
As the story unfolds, readers will immerse themselves alongside the children in how they use their wisdom to solve mathematical puzzles step by step and eventually achieving their escape. In this process, readers can naturally absorb the 16 mathematical concepts carefully selected by the author, and learn methods of independent thinking and problem-solving. This is not only an adventure about mathematics but also a leap in thinking and a journey of self-growth.

"Children Who Escape from the Math Cave"

[Author] Ryu Seung-jae (Phonetic translation)
His book "The Way Children Learn Mathematics Well" is regarded as the Korean Bible of math learning. Other works such as "In-Depth Learning Methods for Elementary School Mathematics", "True Learning Methods for Mathematics", and "Children in the Strange Math Prison" are also bestsellers in the field of Korean mathematics learning.
He graduated from the Department of Mathematics at Korea University and has 26 years of experience in teaching mathematics. He has taught both top-performing and bottom-performing students, from elementary school children to repeat students. He is active not only in school teaching but also in various fields such as thinking mathematics, competitive mathematics, SAT, AP, and mathematical argumentation. He operates the YouTube channel [Learning Brain Math Method] and is also engaged in writing and speaking activities, committed to conveying systematic and detailed methods of learning elementary school mathematics to parents.
He hopes that children will start with curiosity, seek answers, and enjoy the joy of learning mathematics; he hopes that children will not hate mathematics but will experience it correctly with a leisurely mind. For this reason, he wrote the math fairy tale books "Children Who Escape from the Math Prison" and "Children Who Escape from the Math Cave," which have received enthusiastic support from young readers.

[Illustrator] Jung Eun-sun (Phonetic translation)
Majoring in advertising design, she learned to draw at SI Picture Book School. During this period, she illustrated works such as "The Home That Takes Away Worries", "The Child Who Hugs the Stars", "The Rice Cake Ghost, My Grandmother", "Spider-Man Zipper", "Horse Gourd", "Guardian of Park Middle School", "The Things That Are Valuable but Invisible", "A Cliff in Everyone's Heart", and "To the Youth That Grew Up Too Early", etc. She is now painting in various fields.

Author's Words
Chapter 1: I Want to Become a "Math Incompetent"
The Discarded Math Book
The Discovery of Mathematics
Memories of Dad in the Shopping Cart

Chapter 2: The Math Master's Pharmacy
With the Old Man and the Pharmacy
The Special Prescription
Pizza Made of Grades

Chapter 3: In the Pharmacy's Basement
The Vanishing Key
Children Who Enter the Basement
The Asura Principal of the Headache Elementary School

Chapter 4: Being Together, We Can Solve Any Problem
Candy Fish That Eat Plastic Foam
Mathematical Principles Taught by a Hundred Children
The Method to Cross the Bridge in the Shortest Time

Chapter 5: Escape! Break the Walls of the Math Prison
The Secret of the Math Prison Bricks
Return to the Master's Pharmacy