I am the family genealogist and a fairly-advanced photoshop user. I have spent hundreds of hours over the years restoring old photos (and need hundreds more) dating back to the 1890's and there wasn't an easy one in the lot. I've referred to the first edition of Ctein's wonderful book on photo restoriation (as well as Katrin Eismann's which now needs revision) so often that they are worn to and have so many colored tabs on their pages & so much highlighting that it's hard to find an unmarked spot. I was excited to see that a second edition was coming, and I'm not disappointed.
I have found Ctein's approach to restoration problems to be clever, original, well-explained and professional. His mind and mine are completely different because he comes up with techniques I would never have conceived (and I can be pretty inventive). I have had great successes using his methods and only one notable failure. I cannot seem to achieve the same results he does when restoring photos printed on honeycomb paper, even though I do have all the required software. Maybe my black and white photos require a different treatment than his color example.
SOME THINGS HAVEN'T CHANGED:
This second edition has much of the text and most of the illustrations (if not all) of the previous edition I'm so familiar with. It has been completely restructured from the order of presentation to the chapters and headings. There seem to be additional screen shots and there might be additional text, but since this is a book that you refer to on an as-needed basis, I can't specify exactly what is new. Nothing I've found important appears to be missing. It is as encyclopedic in breadth as the previous one. I think that the reason it has fewer pages is because, to my dismay, it has smaller print.
SOME NECESSARY CHANGES WERE MADE:
----an updating of Photoshop procedures and options to bring it up to CS4 (CS 5 is now out, but it doesn't provide any restoration-specific advances unless you need to make complicated selections or masks. The noise reduction advances are mostly for RAW's so won't really apply to scans.)
----a review of the other programs and plug-ins recommended in the other book to add new ones and remove discontinued ones. (Although Noise Ninja, Digital Roc, and Digital Gem are still listed and they haven't been updated in at least three years, making their ongoing compatibility with newer versions of PS, newer operating systems, and the newer of 64-bit systems a bit doubtful). He apparently doesn't care for others I have found of use in restoration work (like Genuine Fractals, Topaz Denoise, and Nik Dfine).
----an updating of hardware options, as well as revised memory requirements and archiving options. (After all, if I'm going to all this trouble, it's to leave something future generations can access.)
----an added emphasis on working in 16-bit depth.
SOME CHANGES WERE EXTREMELY WELCOME:
----the new symptom tree that follows the Table of Contents is pure genius. Sometimes the user is faced with a problem he doesn't know the name for: how does he look it up in the index? This way, if you see an image thumbnail with a problem that resembles yours, you go to the pages indicated. You don't need to know that the metallic gleam is called "silvering" or that the darkish spotting is "varnishing." You go straight to the pages you need to see.
----highlighted text sections to bring attention to particularly important or relevant information.
SOME REALITIES REMAIN THE SAME:
As before, the recommended approach to tackling a particular problem might not be straight Photoshop or Elements (these still remain the core tools for the most part). Many, many other programs and plug-ins are recommended instead when the author feels they target a particular problem in a more constructive way. I can understand that a professional restorer might be able to afford the expenditure involved in getting all this specialized software, since he will use each on many occasions. A casual restorer can't afford the luxury of buying software which is so issue-specific--but it's still good to know that these options exist.
If you plan on restoring photographs this book is not just recommended, it is required.