This eBook goes through lots of different things to take pictures of and gives tips for improving them. For example, it shows how to take better landscape shots, fireworks, flowers, etc.
What got me about this eBook, honestly, is that it was nothing fresh. Maybe it's becasue I know photography already but I wasn't amazed or anything. It was just the same old info you could get at a library for free.
From reviewing a lot of photo eBooks, I have to say the best value ebook on photography is Photo Techniques eBook (phototechniques.info/ebook.html) that's only 29.97. You can, of course get the audio program as well for a LOT more money.
Anyways, going back to the eBook:
Conclusion: Digital Photography Secrets is NOT filled with "secrets" but normal info you can find at any photography forum.