What is your opinion on using incomplete sentences? I know it's not a good idea in non-fiction but I was under the impression that it was fine in fiction. After all that is how we talk so it sounds a little more natural. However, several reviews that I received on another site, of my work have pointed to incomplete sentences saying it's a problem. Here's an example: He’d been sitting on that bench since 8:00 A.M. Wearing a red baseball cap and sunglasses while pretending to read a book. and Bianca muttered a quick thank you and then clutching the straps of her backpack, she headed down the long driveway. Her feet crunching on the tiny stones. Should I replace the period with a comma and just make it all one really long sentence? Thanks for the help!