Rating: 
Summary: Good, but basic, and the editor should be fired.
Review: The information is quite good, though not very in depth. The examples are good, as they explain, "See, this really *can* be used in 'real life'." There is also some programming information, so for some parts (nothing critical, just program design), a knowledge of C is useful. Personally, this is my first book on steganography, so the technicality of the information was at a good level (informative, but not buried in jargon or advanced math). I have no programming background, but skipping the program designs was not a detriment in any way.
However... I think the editor should be bludgeoned once or twice with something heavy. I have written some documentation, and the editor did things that I know never to do. First, there are a few grammatical errors, which cause serious problems if you are not paying attention. (In one example, it is said the user (I don't have the book in front of me) "attaches her private PGP key, encrypts it with [the other's] public PGP key, and sends the email". This is after saying many times "NEVER EVER SHARE YOUR PRIVATE PGP KEY!!!". Then, the example goes on to say the recipient "uses the public PGP key, which is attached...". (The first sentence should have read "public PGP key"). In addition to one or two other situations like this, there is also an issue with the inline images. They all appear only at the top and bottom of the page, while the author clearly intends for some to be in paragraphs. The author says things like "as seen in this image:", but the sentence continues, and "this image", the number of which is not given, is elsewhere on the page. Further, many images have the eight resize anchor points and thick border visible from screen shots; these should have been Photoshop'ed out (it's not that hard, I've done it with Paintbrush).
If you are looking for advanced work, skip this. For a basic work, I would give it five stars, but the editors errors are so bad....
Rating: 
Summary: Great combination of technical detail & background
Review: This book does an outstanding job of combining both technical details and background to create a very interesting read. It's not dry like most of the other books on this subject, and I truly enjoyed reading it. The author does a great job incorporating analogies and explainations to demonstrate "practical" applications. I would highly recommend this book to anyone that is either new to the subject, or would like a refresher to expand their knowledge of the subject (like myself).
Rating:
Summary: Great combination of technical detail & background
Review: This book does an outstanding job of combining both technical details and background to create a very interesting read. It's not dry like most of the other books on this subject, and I truly enjoyed reading it. The author does a great job incorporating analogies and explainations to demonstrate "practical" applications. I would highly recommend this book to anyone that is either new to the subject, or would like a refresher to expand their knowledge of the subject (like myself).
Rating:
Summary: Very well done!!
Review: This book is excellent! It gives the reader the option of beginning from scratch or quickly referencing needed information. The author gives you all of the information you could need to have a firm grasp on stego and allows you to develop your own ideas from there. It's definitely a book for active minds! I'm glad to see there is finally a good book covering Stego!
Rating:
Summary: perfec t for decision makers new to these technologies
Review: Unlike other books on cryptography and steganography, this book actually helps you learn and understand the material. It doesn't assume prior knowledge, and helped me greatly to understand the topics - not simply from a theoretical perspective, but provided examples and source code. A must have for anyone who has interest, technical or otherwise, in cryptography or steganography.
Rating:
Summary: The author obviously knows his stuff!!!
Review: Unlike other books on cryptography and steganography, this book actually helps you learn and understand the material. It doesn't assume prior knowledge, and helped me greatly to understand the topics - not simply from a theoretical perspective, but provided examples and source code. A must have for anyone who has interest, technical or otherwise, in cryptography or steganography.
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