On a side note… Jon is a master at C#. If you do any C# then you will see his name often (especially if you Google C# questions and get taken to Stackoverflow).

I didn't want to say anything because I haven't read any books by Jon Skeet but I have seen reviews of his books while I was looking for good books to read. He is higly respected and the book in question has like 4.5 stars on Amazon. I'm damn good at picking out shill reviews and the reviews on his book look genuine to me.

Youtube dude is about worthless.

List of tutorials for beginners: https://docs.microsoft.com/en-us/dotnet/csharp/