Publisher: Poplar Publishing Oshiri Tantei Series (Butt Detective Series) ISBN: 4591149225 Single Volume Release Date: March 2016, 1st Printing October 2018, 18th Printing A series of robberies are occurring. Is the culprit a giant, 5 meters tall? Oshiri Tantei (Butt Detective) will solve this case with a "pupupu"! This is the second installment in the mystery reading series, where you search for pictures and solve mazes while looking for the culprit. There's a spot-the-difference game on the back of the jacket. No cover. #OshiriTantei (Butt Detective)