I am a person in my 30s with a liberal arts degree who has worked in other industries until now and is preparing to change jobs to become a developer. In my case, before I first jumped into this path, I searched the Internet thoroughly for information, and there are many people around me who are developers, so I heard a lot of different stories, so for me, there wasn't that much new stuff compared to the price...ㅠㅠ If you are thinking about changing jobs to become a developer but don't have anyone around you to help you, I recommend this book. The KakaoTalk room for reading development books on the way to and from work is very famous, and when I created a GitHub account while preparing to change jobs to become a developer, the first person I followed was Han Jeong-soo. The articles were so interesting that I think I read them all from beginning to end in one sitting!!