Does anyone know of a clear and concise breakdown of the various reasons that are imagined proposed for why Isaiah is supposed to be written by three different (at minimum) authors? Book, article, whatever...just want it to be clear and concise. I'm thinking that the reasons for this notion have to be more substantial than those outlined in the Wikipedia article "Book of Isaiah". Those "reasons" are so brittle that a polite sneeze would fracture the whole edifice into dust.