This Book light is good because it is very easy to follow. Each step is completely and thoughtfully laid out in a reasonable order. It is accompanied by photographs that shop each step. The items needed are listed in a nice reference section.
This speaker project goes wrong by telling without showing. The steps are written out, but not in a very easy to follow way. The pictures do not show the steps used to complete the project. Too little information over all.
This is a mess. The photos are just the finished product. What is written tells basically nothing about what to do.