A picture book for toddlers with unique characters and a fun story. - Title: Oshiri Tantei (Butt Detective) - Author: Troll - Publisher: Poplar Publishing - Series: Oshiri Tantei Files - Language: Japanese - Target age: Toddlers Thank you for viewing. I am selling this because my child no longer reads it. It has been read quite a bit by my child, so the condition is not very good, and it does not have a paper cover.