The lecture content itself is new. Most of the lectures seem to be based on existing services such as clone lectures or shopping malls, but this book review is an attractive topic that I want to try to make into a service, and there is a lot to learn from it. I will write down a few things that I liked. 1. Not fancy, but clean UI (since it is a lecture for learning, I did not focus on UI, but it is simple and complete...) 2. Directory structure design and each pros and cons (very agree) 3. Provides the process of handling problems that occur in the middle 4. Refactoring while developing (I liked the format of developing and refactoring according to the flow of consciousness rather than inputting already refactored code) 5. Naturally learned through repeated use of BLOC pattern using Cubit I really enjoyed the lecture. I plan to study it again when I have time. I look forward to your future lectures! ps, your recently published 'Hands-on Flutter by a Developing Man' Thank you for your hard work. I think it would be good to look at it together to learn Flutter. Thank you!