I found the book to be useful in terms of providing some overall ideas for what can be done to a landscape, but useless in terms of actually getting down to the business of landscaping.
For instance, the section about grass types lists 8 different grasses for my region, which is nice, but it doesn't give you any real way to compare and contrast those 8 types to choose which one you want. For some grasses it tells you if they are seed or sod, but it doesn't give that info for all the grasses. Same thing for shade or sun, disease resistance, etc... In the end I had to go to other sources to figure out which type of grass I wanted in my yard.
Same thing happened when picking shrubs. Pictures of different shrub types would have been helpful, but instead there were just basic descriptions that were hard to compare and contrast among the shrub types.
This book is very general and not that useful for people who are actually ready to start landscaping and need help making the decisions about what will go into their yard. I was pretty disapointed because I've had great luck with other For Dummies books.