Very well, sourcing images is basically what some struggle with for some time. Well, I think I got it on the first hand.
@shadowspub I'd like to ask: what if, for a movie/book review, I get the cover image or any image of a part of the book or movie and then edit it - added some texts,images etc. does that make it okay?
based on the information that @papacrusher supplied in an official link to what fair use is, you can use the cover legally. But, like I said to @intishar beware the community you publish to. If the moderation in the community says no, then it's no.
Alright, I get it now..thank you!!