My newest project is a YA fantasy novel. Thus far, I've started it with a prologue, giving the reader a glimpse far into the story. I know that sometimes beginning a novel with a prologue can feel cheap. The prologue, such as it is, is only a paragraph and a line so far. But I feel that I should keep it, even if I need to lengthen it. What are some dos and don'ts of prologues? Is there any set length they should be? I checked out some books on my shelf and saw one that was a trade paperback and the prologue was two half-pages (due to the Prologue word being halfway down the first page). I'm not sure how big mine would be in print, but it looks puny. Any suggestions?