Here's what I would do with it if I was editing it. Take my opinions with a grain of salt (I hope you were looking for opinions). Take a few of these ideas or ignore:
IMO I'd cut the vid to just the first 20sec or so before the guitar. Maybe put it on repeat with the cool echo. Use that as the meat of the ad with your book and leave it at that with mystery. I love the smoke effect and I think that's gold for this book trailer.
If you're going to have the field image, show it without any writing. But I don't particularly like this image. It looks very AI (is it AI) If you choose to still use , cut the writing. And if you have writing, use the same font as the intro.
I'd also cut "a place to fear". I know this is your focal point but I'd simply use your book here.
I don't like the electric guitar in the music.
BUT I really like the music at the beginning, particularly the stereo effects.

I recommend a loop of the same for 40seconds.
Decrease the writing as PJ suggested. Simplify it as much as possible as an ad. We think like writers when we do ads. People don't like writing in ads, that's been my experience.