Unity 2018 Augmented Reality Projects: Build four immersive and fun AR applications using ARKit, ARCore, and Vuforia

While there are some good ideas presented in this book, crucial steps are omitted, and certain syntactical details like dll import names are flat out wrong (not matching the name of the actual dll files) with some projects, especially the later ones. There's no coverage about what the "OPENCV_DIR" variable is or does -- the author just drops it in there as if you've already gone through a nonexistent tutorial on environment variables. There's no coverage about building an OpenCV plugin from macOS, or about why there's only one precompiled lib file instead of the four he tells you to look for (if compiling from the source is required, he needs to say that instead of telling us that the precompiled binaries are just as good).Overall, there's enough basic material to be worth a few bucks, but it was certainly not worth $50.