Ben did a great job on the first edition of this book by providing context and sample material, with GitHub links so you can try everything out for yourself. He gets pretty into the weeds on several aspects of .NET code. This book is not for someone who writes simple APIs or web apps that do not contain a ton of non-CRUD type C# code. This book is for someone doing I/O intensive operations that really needs to squeeze more performance out of their code without simply turning up the scale dial.