Files to accompany the book C# Game Programming Cookbook for Unity: Second Edition, by Jeff W. Murray and published by CRC Press.
Buy from all good bookstores or direct from the publisher's website below: https://www.routledge.com/C-Game-Programming-Cookbook-for-Unity-3D/Murray/p/book/9780367321642
If you are looking for the files that accompany the first edition of this book, you can find them here -> https://github.com/psychicparrot/CSGPC-FIRSTEDITIONFILES