I really did not like this book. In fact I quit reading it at page 144. I really wanted to know something about the migration of (soft- and hardware) systems and the possibilities to deal with the many accompanying problems.

What I got was a loose assortment of information we could read over the past decades in our trade magazines. Besides the misleading title, I also could not find an added value in the contents: no special selection or special assessments of the topics. Just contents thrown at the reader.

Even many figures were just copied. What was obviously before in color is now in a blurred gray style. With the consequence that some legends can not be properly mapped to the figure elements.

I do still consider upgrades and migrations an important topic and would be thankful for a good book on it.

I really enjoyed this book! And that is a real surprise to me. I read it for the information and expected it to give me that. But, it is so well written that not only could I understand it but I also found it to be enjoyable reading and even humorous at times too. It was very easy for this "dummy" to understand. I loved it!