Khonkaku murder (set of 3 books)

"Tokyo zodiac".
Japan, 1936. The eccentric artist, who lived along with six daughters, steps and nieces, was found dead in a room locked from the inside. His diaries dedicated to alchemy and astrology contained a detailed plan for the murder of each of them. To deprive the life of several to give life alone, but perfect - the owner of the most powerful qualities of all the signs of the zodiac. And shortly after this, the plan was fulfilled: parts of the bodies of these women are found hidden throughout Japan.
By 1979, the Tokyo murders in the zodiac have excited the nation for decades, but were never disclosed. The predictor of fate, the astrologer and the great detective Kiyoshi Mitarai and his illustrator must solve the secret of this impossible crime in one week. You have all the necessary keys, but can you find a guess before they do it?
"House of Crooked Walls".
Japan, Christmas 1983. The rich industrialist Kodburo Hamamoto gathered in his mansion of friends and acquaintances. The guests are struck by his house - a bizarre structure with many rooms, inclined floors and it is not clear where the leading stairs, with a "falling" high tower resembling Pisan. All of them are admired by the fantasy of the owner and are preparing to meet Christmas fun.
But their expectations are not destined to come true. Because in Christmas Eve in the house there is a murder. The driver of one of the invited dies from the blow with a knife. Urgently called police officers in complete confusion. After all, the murder was impossible to commit - all the circumstances and conditions against this. And no one has a motive ...
While the inspector and assistants are racking their heads, and the guests are in prostration, the second murder takes place in the house, even more incredible. Having contacted the superiors, stunned police officers learn that a person who is able to find a criminal is going to them. That this is an astrologer and fortuneteller from Tokyo Kiyoshi Mitarai. And that only he alone is able to figure out this breathtaking puzzle ...
You will have all the necessary keys. But can you find a guess before the detectives do it?
"Murders in a deckagonal house".
A secluded island where a mysterious mass murder occurred six months ago. A small piece of sushi with elaborate buildings - creations of a strange owner of these places, Seiji Nakamura, among others who died in that cruel massacre. They say that his ghost is still wandering there in the dark ... Are there a more suitable place in the world for members of a student detective club who adore such secrets? The mystery that they have to face is not one of the cabinet puzzles that they got used to: without knowing it, amateur detectives took something expensive from the late Nakamura, and now someone is craving for retaliation ...
In accordance with the canons of the Honkak genre, from the very beginning, we know that these characters are destined to die. And in the course of the action we learn everything that will help us to compete on equal terms in the desperate search for the killer with his future victims. And with an incredible detective whose name is Kiyoshi Simada