Pluto: Urasawa x Tezuka, Vol. 6

Who Killed Astro Boy?
In an ideal world where man and robots coexist, someone or something is after the seven great robots of the world. Interpol assigns robot detective Gesicht to this most strange and complex case--and he eventually discovers that he is one of the targets!
Pluto… Sahad… Goji… Abullah… Mysterious figures somehow involved with the serial murders of the great robots of the world. Europol's top robot detective Gesicht has been put on the case, and he's mere steps away from discovering the horrifying truth behind the killer and his motives… Little does he realize that he's also steps away from discovering a horrifying truth of his own… Masterfully crafted science fiction and suspense at its best!