The seventh volume of the fun children's picture book series "Oshiri Tantei" (Butt Detective). The Phantom of the Observation Tower. Except for a crease on the cover, the inside is like new. - Title: Oshiri Tantei (Butt Detective) - Series: Oshiri Tantei Files - Volume: Volume 7 - Publisher: OPT - Price: 980 yen (including tax 1,078 yen) - Contents: Picture book / Children's book Thank you for looking.