Getting Additional Help
One book, even one as awesome and mighty as this one, cannot cover everything, especially when it deals with two complex programs.
Thus, I encourage you to use this book as a launchpad and when you invariably encounter new situations where you need additional help, to make full use of the ample free resources available at your (virtual) fingertips.
The official Unity Support page is at https://unity.com/support-services and the extensive community forums are at https://forum.unity.com.
The official Blender support page is at https://www.blender.org/support/.
There are many other unofficial high-quality support sites if you do a little Google searching.
As mentioned, YouTube.com has a vast array of tutorial and showreel videos.
Packt Publishing also has an extensive line of books for Unity and Blender that delve into many specific topics in much more detail than we can go into here. A complete list can be found by searching at https://www.packtpub.com/.
