I would like to know...if I market a free ebook. But sell it for 5-10 dollars...will I endure anything legal...if the original owner happens to find out? Assuming that I give all credit to that person for writing it.
Do you have permission to distribute this ebook? Even if you got a copy for free, that doesn't mean that you have the right to sell or give away copies yourself. What you need to do at look at the license that came with the ebook to see if and how you are allowed to distribute it.