To get the most out of this book

1. It will help to have basic understanding of any programming language but knowing JavaScript will help the most
2. Here are some tutorial resources that you can take a look to help learn about the languages covered in this book:
   
   • Node.js - https://www.w3schools.com/nodejs/
   • C# - https://docs.microsoft.com/en-us/dotnet/csharp/quick-starts/
   • Xamarin - https://docs.microsoft.com/en-us/xamarin/android/
   • Android - https://developer.android.com/guide/