In these times when it's not enough to just do front and back, I've always wanted to vaguely create front and back separately and create a normal integrated project once. I think this is a really good lecture for those who are curious about the integration of both sides with one main, not those who only know one side. I didn't buy the book, but I think the lecture is sufficient. However, I think it would be possible to reduce the time spent looking it up again if you study it with the book. For your reference, both React and Spring require some prior knowledge, but since these are contents that can be learned in just a week, I think this will be a good lecture for those who are even a little interested in full stack. Thank you for the great lecture.