I see two main problems with this cover:
1) It's a photography book, but all the photos on the cover are either small or obscured by text!
2) It's way too busy - not doing it's job!
The job of the cover isn't to tell someone everything about the book (the reverse is where they'll look for that info, and the contents page) - the job of the cover is to hook people and get them to pick up the book.
I'd echo the same points as others:
- Lose the images on the left, they are too small to be appreciated.
- Lose all the bullets - move them to the reverse cover, where they quickly convey to an interested person more about what the book covers.
- Lose the web address - it serves no purpose on the cover.
- Lose the overlayed model on the sky.
All of the above also disrupt and obscure the main photo on the cover, which is a fantastic shot and so unobscured it will draw someones eye to it. Then the brief explanation you have makes them realise this book covers what they are interested in (photography business), they then pick it up and turn it over.