The series “Girl Detective Agatha Mystery.”

Endowed with amazing instincts and a phenomenal memory, Agatha Mystery dreams of becoming a writer. But that’s in the future, but for now she’s just an excellent detective! Together with her hapless cousin Larry, a detective school student, she travels the world to solve the most perplexing mysteries. And they are helped by a devoted butler, a mischievous Siberian cat and many eccentric relatives.

Nightmare HalloweenLarry Mystery has completely forgotten the promise he made to his sister Agatha. But there was nothing to do, I had to change all plans at the last moment and fly to America, to the city of Salem, which enjoys the controversial reputation of the most witchy place in the United States. People here are used to celebrating Halloween on a grand scale! But the very first prank, of which Larry becomes a victim, turns out to be not so harmless. Will our heroes really have to deal with evil spirits on Halloween night?