There is nothing new in that.
Sure we’ve all had that thought about a blog or a book.
When reading a book, it gives you many smart ideas that are great but you somehow already had those thoughts at the back of your mind. The book is not really saying anything new.
What is actually happening is we have a bunch of thoughts in our mind, but we are not really sure about them. We think those are weird thoughts and no one in the world around us really follows them. Since no one follows it we think those are ideas that were tried and failed.
The book reassures you that your thoughts are right. There are other people somewhere in the world who thought exactly the same way as you did and it worked out for them. The book just make you believe yourself more.