Aho, Ullman et. al's "Compilers" is a fantastic book and well worth studying for all computer programmers - implementing a compiler compiler will yield tangental benefits to anyone who writes programs for a living or for fun.

However, the Amazon Kindle edition of this book is *awful*. First and foremost, I discovered at least one error in an algorithm that is not present in the standard edition that causes the book's proposed algorithms to be incorrect (in this case, it was algorithm 4.31 - in step 1, you should compute FIRST(alpha), not FIRST(A).)

On top of that, there are spacing issues and font issues throughout the book. It appears that in many places where the standard edition had a word separated across lines, the Kindle edition merely has that word split in two with a space between its halves. Worse, the font choice used to typeset algorithms doesn't easily distinguish many greek lowercase letters from their modern English equivalents, the result being that it is fiendishly difficult to understand some algorithms (the book uses greek letters to indicate a 'sentential form', so they appear a *lot* and tend to be right next to their modern equivalents.)

In other words, I would give Compilers (the Standard edition) a 5/5 (or maybe a 4/5 - it could stand to use a bit more real-world code), but this Kindle edition is rubbish and you SHOULD NOT BUY.