Well-organized. Chapters about specific settings and conditions. Photos of each plant discussed in the chapter that follows are in a montage at the beginning of each chapter and numbered. Most, maybe all, are described in the chapter, which might be about plants for slopes, sunny or shady areas, plants that spread aggressively, etc. I wish there had been more consistency in conveying characteristics. A key thing: whether the plant is annual or perennial. That wasn't always mentioned, and such details are buried in the descriptive text. It would be more helpful if they be listed at the beginning of each entry for each plant and include zones and native regions.
The author clearly knows plants and planting, so all details included were useful ones. What didn't make any sense to me was citing certain plants as good choices for groundcover. Peonies? Not. That's just one of several examples. As with nearly all gardening books, it seems, there were too many plants that were best for the Northeast of the US. I'm in the Pacific Northwest, and there weren't many for our region, although there were some.
All gardening books should identify the plants on the covers, given that those are what attract many of us to the book. Like most, this one did not, and I'm still looking for those photos with more info inside the book. That's a waste of time and irritating.
All in all, there are enough positive points that it's worth looking through if you're looking for groundcover plants. I bookmarked a few to research further.