Need Input on book covers

I would like some input on one of my series book covers. This is the one currently available on Amazon and I’ll be releasing another in the series in the next couple of week. That cover will be same as this one with a different color font and different sub title.

So, before I commit to far into the series I’d like some input on this. Do you think this is professional and attractive enough. On Amazon the cover is critical to get people to take the first look. So please let me know what you think.