What are some genres that have been phased out (for whatever reason), but you wish would make a comeback? Prehistoric Romance - Stories of early man fighting Dinosaurs don't show up very often anymore. If anyone knows of a book like this, please let me know. The closest I've heard of returning to this genre would be Harry Turtledove's little series. But that just has Mammoths. Sword & Planet - In the mold of "John Carter of Mars", I don't see many stories like these anymore. Which is unfortunate, because they're really whimsical and a lot of fun to read. The Lost World - It's a shame people think we've seen every square inch of the planet. I miss the Island Full of Dinosaurs stories.