One of the biggest questions I had before reading this e-book was, Is it really worth the 30,000 won? The conclusion is that it is worth it. But this is on the premise that I follow the guide provided by the author. For a lazy job seeker like me, 30,000 won is a lot of money. It is not money that can be paid simply out of curiosity. It is enough for 2 chickens, 10 cups of coffee, and 30 hours at a study cafe. But I decided to pay for hope. If it gives me even a handful of motivation in the vast ocean of development, 30,000 won will not be wasted. The links are more useful than I thought, and for a newbie without information or connections, it is like honey. Of course, it does not go down like honey. To be honest, the amount of text in the 34 lectures is not friendly to digest this vast amount of information and learning. He is a helpful teacher who tells you what he needs to tell you, even though he is not friendly. And it motivates you. There are many mountains in the world. And there's a guide. And here's a good guide book. Now you can climb.