Anyone in the market for Smoky Mountain hiking guides has plenty to choose from. In my view, this one comes in at the very top.
This guide describes 82 hikes in Great Smoky Mountains National Park. The hikes range greatly in difficulty from flat 0.5 mile nature trail strolls to challenging 30+ mile multi-day backpack treks. The hikes are located almost uniformly throughout the park with 45 hikes in Tennessee and the rest either on the state line or in North Carolina. Not every trail in the park is described, but enough quantity and variety will be found here to keep most hikers busy for a long time.
Each hike contains a nice grey-scale map, directions to the trailhead, a detailed elevation diagram (drawn to scale) showing the trail's ups and downs, and an excellent trail description. I guess it would have been nice to have the elevations on the map (like a USGS topo map), but the method used here seems to work fine. The trail descriptions give good guidance on the trail without getting bogged down in excessive details or overly mechanical measurements. A few obvious examples of cut and paste can be found among the descriptions, but these cases are the exception.
With regards to the Appalachian Trail, Adams does commit a section to describe the Smoky Mountain section of the AT. However, this section comes at the end, and since many parts of the AT are covered in earlier hikes, the AT section often mounts to a list of references to earlier sections. Thus, those looking for dayhikes on the AT will find plenty to like here, while those looking for a complete, self-contained description of the Smoky Mountain AT will need to look elsewhere.
In summary, I have several Smoky Mountain hiking guides on my shelf, and this one is the best of the lot. If you absolutely require that every trail in the park be described, then you should buy "Hiking Trails of the Great Smoky Mountains" by Kenneth Wise in addition to this book. However, Wise's book has some significant flaws, as I have detailed in my review of that book. Most people will find all they need in Adams' book, and I highly recommend it.