The Door That Opened by Itself
An old blue door in the school library opens all by itself—but no one is there. Mila and her friends take on their first impossible case. Can they track down an invisible force, test their bold ideas and show that even the strangest mystery can have a simple explanation?
Beginner·0 minOriginal story
An old blue door in the school library opens all by itself—but no one is there. Mila and her friends take on their first impossible case. Can they track down an invisible force, test their bold ideas and show that even the strangest mystery can have a simple explanation?
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