★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

Receiving the invitation for the organizing committee of the Juvenile Deduction Contest, the members of the X Juvenile Detective Agency travel to a small island in the middle of the sea, Chiwu Island. The competition will be held in the island's hemispherical villa "Conch Pearl Manor".

During the two-day competition, apart from the four finalist teams, there are only Mr. Xiong, the leading teacher, and Uncle Hou, the chef, on the island. Mr. Xiong announces the content of the final: the first team to find the conch beads hidden by the organization committee on the island would be the winner of the competition, and the clue is an enameled table clock.

That night, Alan Boe finds that the clock chimes once an hour, and each time a mechanical bird would drill out and "sing" a melody. After analyzing and playing the melody, they conclude that the numbers 1, 3, 5, and 7 were represented by do, mi, so, and si, but they can't deduce anything more...

Many strange things happened on the second day. Mr. Xiong disappears strangely, and Uncle Hou's phone is stolen, with the phone line cut by people. Moreover, the goldfish in the fish tank disappears, and the pet black cat brought by contestant Watson also disappear...According to the rules of the competition, the contestants are not allowed to bring communication devices to the island, so the little detectives are trapped on this lonely island!

After searching, the contestant Watson finds new clues on the watercolor paintings: “The fish are eaten by the ocean. The white bear is eaten by the ice field. The cat is eaten by the night..." but the last line of the poem has been torn out.

If "fish" suggests the missing goldfish, "white bear" suggests Mr. Bear, and "cat" suggests the pet black cat, then it's a "missing teaser"! Everyone thinks of the famous novel "No One Left Alive" by the queen of deduction, Agatha Christie: A group of people are trapped on an isolated island and a spooky ballad becomes a gruesome teaser for a murder...

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 Exciting Letter
2. Strange Teams of Competitors
3. The Only Clue is a Western Clock
4. An Out-of-Tune Piano and Mysterious Numbers
5. The First Case of Disappearance
6. Three Lyrics with Unknown Meaning