What should my book be about

If wewe want your book to be similar to the ones wewe mentioned it would be zaidi within the action au adventure genres. All good stories have romances in them. Not all, but a lot. I think wewe should write whatever wewe feel led closest too and see where it takes you. Who knows, maybe you'll start on a dramatic and action packed romance and it might lead wewe into the characters becoming vampires. And that might only set off the path of starting a series au trilogy. It all depends on what wewe feel wewe should write. It is your story and your imagination. Let it run free!
I hope I could be of some help. Good luck with your book!!!