Wreath of Iron Dandelions

Ivan Pavlovich Podushkin loves to spend time with a good book. But by the law of meanness, every time the private detective settles more comfortably with a volume of his favorite author in hand, the doorbell rings, and another client appears in the office. Today, the visitor was Yuri Mironov, who is convinced that he saw his mother in the shopping mall. What's strange about that? Women love to shop. It's just that Ekaterina Semyonovna died a few months ago. Soon after, Yuri's mother-in-law and father-in-law passed away as well. And they died in their sleep — heart attack, stroke. But they weren't sick with anything like that... Yuri suspects that their deaths could have benefited Andrei — Dusya's boyfriend, his wife's sister. He is a sorcerer, a fraud, schemes people out of money, and could well have had his eye on the inheritance. Mironov asks Podushkin to expose the villain. And to answer the question: what was his deceased mother doing in the store?