Let me start by saying that I love reading Lee Frost's books. His work always has a certain style that makes them fun to read. He never has that "I'm the master and this is what you must do" approach. He's more like the guy down the street who just discovered something new and runs over to tell you about it. The discovery might not interest you, but you'll still enjoy hearing about it.
That's kind of what this book is like. These photo projects are things Mr. Frost did to get his photographic juices flowing, so he decided to share them. The problem is, a lot of the projects he mentions aren't really projects. Shooting at first light, last light, in cloudy weather, etc, aren't so much projects as the basics of landscape photography. He also suggests trying old cameras, toy cameras and instant cameras. I'm thinking these suggestions won't be what most people had in mind as photo projects. So a one star deduction for that.
Now, he does have some good ideas in here. Creating a photo blog, using the internet to have a photo book published, shooting the changes in your hometown over time, etc. These are all good ideas to get you out of a rut. Add that to the fun writing style, and you've got a book that is worth your time and money.