★It is a logic practice manual for children written by Yang Zixi, the winner of the Bingxin Prize for New Writing in Children's Literature,
★Humorous and intelligent detective stories allow children to exercise their detective skills and logical thinking ability;
★Multi-faceted puzzle exercises allow children to open their minds and gain joy and confidence after conquering difficulties;
★Professional explanations of logical methods help children to activate their way of thinking and see the world from a wiser perspective.

The series includes 12 titles:
“Treasure of ‘Solomon’”
“The Legend of the Black Cat Chamber”
“The Secret of Monet's Garden”
“The Moon Building and the Nutcracker”
“The Nutcracker and the Music Box”
“The Labyrinth under the Rosebud Mountain”
“The Secret of Chiwu Island”
“Chiwu Island and the Conch Pearl”
“The Secret of the Old Mansion in Ancient Town”
“The Phantom in the Illusion Mansion”
“The Magic in the Illusion Mansion”
“Ghost Ship on the Black Wind Cliff”

Do Mental Exercise and Become a Logical King

One day, a poster in the shape of a "Treasure Box" appears on the bulletin board of an elementary school. When the "lid" is opened, there is a strange poem inside.

Solomon's Treasure
The king, his wife and the knights, the four of them is wandering at 24:00. The red carpet always ends, and the truth is hidden behind it...

A new fourth-grade transfer student, Allen Boe, is the creator of the Treasure Box. He plans to utilize his love of speculative fiction to start a teenage detective agency. Those who can find the "treasure" in the game are the members he wants.

Allen Boe discovers that three of his classmates are gradually solving the puzzles – poet Li Sidi, Go genius Fan kuiyin, and his twin brother, Sudoku king Fan Dayin. In order to observe their reasoning ability, Allen Boe pretends to go on a "treasure hunt" with them.

The group searches for clues all the way from the playground track to the poker tournament poster, from the plaster statue of David in the art classroom to the floor tiles under the wisteria arbor...When they finally dig out the box that symbolizes the "treasure," Alan Boe is shocked! The metal coins and the invitation to the detective agency that he has put into the box have disappeared! Inside the box, there are only new clues left behind by the mysterious man: a strange nine-panel grid and a riddle poem.

Allen Boe confesses to the group that he is the mastermind of the treasure hunt, and now, they need to face a new challenge together. From the school swimming pool to the school history archive... eventually, the group finds the mystery man - Carl, their English teacher from elementary school.

It turns out that Mr. Carl is the first to find Allen Boe’s "treasure". In order to test the children's reasoning ability, he deliberately designs a new puzzle. If the children can finally find him, it means that they have the ability of the little detective. In this way, the X Juvenile Detective Agency is formally established! Mr. Karl becomes the special advisor of the detective agency.

Yang Zixi

Graduated from the Central Drama Academy in Peking, she has been awarded the Bingxin Children's Literature New Work Award, Qin Wenjun Children's Literature New Work Award, Children's Literature Mudi Award, the Jade Whale Award for the collection of original fantasy children's literature of the “Great White Whale”, the Shanghai Good Work Award for Children's Literature, and the Third Prize of the National Children's Literature Short Story Competition of “Zhouzhuang” Cup.
She has published long fairy tales such as “The Pianist by the Lake” and “No. 39 Star Street”. Her short stories and serialized works have been published in “Children's Literature”, “Children's Literature and Art”, “King of Stories”, and “Fairy Tale Kingdom”.

1. Treasure Hunting Puzzle on Campus
2. Cloaking of “24 O‘clock”
3. The King Hiding Behind
4. The Mystery Man and the Missing “Treasure”
5. The “Golden Key” in the “Kun Palace”
6. Finding Someone in the “Mirror”