Detective Mystery Book

(No supernatural, detective + pure reasoning, each article has a common reasoning element and is an independent chapter, the style is relaxed and not depressing) This is a story belonging to Inspector A in the parallel world! Each work in the "A Detective Series" uses Detective A as a detective and tells the story of him asking for advice from many mystery fans active in the A forum to solve the case. (I would like to use this series of works to pay tribute to Keigo Higashino's "The Detective's Code"!)