★ An immersive mystery adventure series crafted for readers ages 8-12, which has accompanied hundreds of millions of young Chinese readers through their childhood! Author Lydia is a two-time winner of the White Dolphin Original Children's Literature Award (a prestigious honor in Chinese fantasy children's literature), has published over 100 works, and is also an experienced animation scriptwriter—her stories naturally possess a cinematic narrative quality!
★ Three young detectives with distinctly different personalities—Sam Doo, calm and rational, serves as the team's logical core, never missing the slightest clue; Vison, bold yet meticulous and agile, is the team's action leader; Jessie, timid but persistent, excels at recording and analysis, always spotting overlooked details at critical moments. They navigate between city and wilderness, ancient castles and school campuses, using wit and courage to unravel one seemingly impossible mystery after another!
★ Each story is embedded with substantive knowledge! The maze in Castle Owner is designed according to the authentic Star of Solomon pattern; the girl who cannot be exposed to light in The Girl in Red in the Secret Room suffers from the rare genetic disorder Xeroderma Pigmentosum; Stay Away from the Night Watchman features Four-Corner Numbers used as a secret code... As children read, they unconsciously unlock all kinds of fascinating trivia. The clockwork-precise reasoning comprehensively cultivates observational skills and judgment.

The series includes 8 books:
Castle Owner
The Girl in Red in the Secret Room
The Zombie in the International Hotel
The Trap in the Friendship Association
The Cursed Haunted House
The Mysterious Disappearance of the Gambling God
The Ancient Temple's Sacred Beast
Stay Away from the Night Watchman

After young boy Bogo's grandfather dies, the old house becomes haunted, and someone receives letters from grandpa. The Trio discovers a hidden tunnel beneath a dry well, at the end of which lives an old man who looks exactly like grandpa! Decades ago, the real grandfather was sold into forced labor at a coal mine. His twin brother assumed his identity, raising three nephews as grandfather. Now the real grandfather has returned, but can only watch over his family in secret, like a ghost.

Lydia
A children's book author and animation scriptwriter. She loves exploring mysteries, craves adventure, yearns for suspense, and is passionate about deduction. Beginning her writing career at age 17, she has captivated millions of young readers with her meticulous prose and boundless imagination.

She has published over 100 children's novels, spanning genres including detective, suspense, adventure, and school life. Her representative works include the Coward in Action Series, the Strange House Series, the Magic Helpers Series, and the Super Detective Trio Series. She is a two-time recipient of the White Dolphin Original Children's Literature Award—a prestigious honor in the field of Chinese fantasy children's literature.