This is a set of 10 Oshiri Tantei (Butt Detective) books. Oshiri Tantei Series: ⚫︎① The Purple Lady's Code Case ⚫︎② The Giant Who Disappeared in the Dark Night ⚫︎③ The Immortal Thief Gang ⚫︎④ Detective vs. The Emperor ⚫︎⑤ SOS from the Ruins ⚫︎⑥ The Detective Agency in Danger (no cover) ⚫︎⑦ The Mystery of the Observation Tower ⚫︎⑧ The Thief and the Targeted Bride ⚫︎⑨ Who Gets the Lucky Cat?! ⚫︎The Curry Case *Only sold as a set.* Covers are included for all books except ⑥. The name written on the inside cover of ④ has been blacked out. There may be some wear and tear on the covers, such as creasing, minor scratches, and corner wear, but the inside pages are generally clean with no writing, folds, or stains. Each book has been inspected, but please forgive any oversights. Please understand that these are used books before purchasing.