I loved this book, not so much for the metaprogramming “spells” as for the absolutely lovely unpacking of Ruby’s Object Model. I wrote a review over at “Goodreads.com”http://www.goodreads.com/review/show/569268658 and gave it 5 stars.
There are a number of errors in this edition (Kindle version) where there are missing words and phrases. It was a bit annoying, so I hope these get fixed in future editions. There is the ever-present problem of reading a technical book on the Kindle as well where some of the code snippets extend off the page.