【Different Mysteries for Each Bookstore】Limited Distribution at 4 Bookstore Chains! Original Mystery Cards Gifted to Purchasers of 'Mystery Detective Schloss'!
NQ Score
34/100
N1 Content Completeness
4
AI Summary (NQ-processed)
The first volume of 'Mystery Detective Schloss: Secret Detective Debut!', a children's book series from RIDDLER, led by Ryogo Matsumaru, was released on April 22, 2026. A campaign is now underway offering exclusive original mystery cards at 4 major bookstore chains, with different characters and mysteries available at each store, promoting a new reading experience that combines reading and mystery-solving.