PROOFREADING & EDITING :The challenge 

In the ckourse opf their  editing work publishing houses enable  authors to review their  previous workd, to elaborate on new ideas and to bring in  any other change whether in the text's layout or in the text's matter. Hence the calling :"The 1st Edition ,the2nd Edition...

On the other side proofreaders enable authors to make sure the text they wrote is the right match to the idea in their mind.In case of a failure proofreaders may bring in  authorized changes prior to any translation work.

Then what is the challenge all about?