If you're interested in how cinema started especially in the United States then this is a very reliable piece of work. I was mainly interested in first American movies and the main characteristics of them, therefore I have to admit that I was skimming through the work at the parts were I felt were too technical for me. Those parts would be great for those who are interested in cameras, or shooting films themselves. I also additionally watched someof the first movies on youtube just to get the impression of how these things that were mentioned in the book are reflected in real art.