★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, the advisor of the detective agency, Mr. Karl, brings a new commission: His uncle, Old Mr. Yue, has a Rosebud Villa in a distant suburb. Two years ago, Mrs. Yue died of a sudden illness, leaving some mysterious messages before dying, but no one can decipher it so far.

Mr. Karl leads the little detectives to the Rosebud Villa, where Mr. Yue shows the messages left by his wife: three cards with rhinoceros, Christmas tree and a circle drawn on them.

The family nurse acts as a model to restore the old lady's posture when she died. Allen Boe notices that the old lady's hand holding the card before she died is strange: Her fingers intentionally blocked the "Christmas", showing only the "Merry", and the circle is "round", so the combination of them is "merry-go-round—the carousel!

During Mr. Yue’s lifetime, she has collected a whole showcase of carousel music boxes, and the one she loves the most has been locked in a safe box by Mr. Yue. After seeing the precious music box Allen Boe notices that there are glue marks on the head of a white horse, which the old lady has dressed up as a unicorn, but the "horn" has fallen off.

It occurs to Li Sidi that the Western unicorn is modeled after the Indian rhinoceros! It seems that the three cards left behind by the old lady are hinting at the unicorn on the merry-go-round!

Based on the clues, the little detectives find that the manor's botanical maze is full of mysteries. Why did the old lady suddenly decide to change the maze pattern shortly before her death? Four "horses" and a "unicorn" are hidden in the maze pattern? What is the mystery of the pavilion pillar in the center of the maze? And what are the past and legacy hidden in the secret box under the floor tiles?

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.An Invitation from the Bottom of the Rosebud Mountain
2.Rings, Rhinos and Christmas Trees
3.A Carousel with Sad Meaning
4.A Labyrinth of Plants that Change Shape
5.Necklace and Diary Hidden in an Iron Box
6.The Secret that Longs to be Known