Although much has been written about "Invasion..." in the past, this is the first book to draw all the disparate sources together into a "summary statement" of the film as a whole. Thank you, Professor Grant, for distilling the essence of previous commentary/research and presenting it in clear, succinct prose. This may sound like something that any competent literary craftsman could pull off, but this book constitutes more than a mere precis. Professor Grant has so internalized his source material that he comes to conclusions swiftly, painlessly, and convincingly. (My only reservations in this regard occur in Chapter 6 which deals largely with gender role interpretations. I may not be convinced here, but I can see his points.)
You will save yourself hours by consulting this volume first before any other. Being intimately familiar with the film and a fair amount of the commentary/criticism, I had the pleasure of learning new information as well as solidifying older ideas that hadn't really taken root previously. An eminently readable and informed look at a classic film.