This is essentially what https://www.goodreads.com/book/show/529511.Code_Reading https://www.goodreads.com/book/show/529511.Code_Reading and https://www.goodrea

This is essentially what https://www.goodreads.com/book/show/529511.Code_Reading https://www.goodreads.com/book/show/529511.Code_Reading and https://www.goodreads.com/book/show/169414.Code_Quality https://www.goodreads.com/book/show/169414.Code_Quality are all about... And about the "what if i don't understand it" bit, i would suggest one goes and reads https://news.ycombinator.com/item?id=15903771 https://news.ycombinator.com/item?id=15903771 ;-)