Rating: 

The indexing is poor. e.g. There is no mention of the word "menu" or "dropdown menu". okay, I know that this is also called a "select list" There is no mention of "operands". There are many other terms with are conspicuous by their absence. Is this just a American /British English language issue or is there more to it - either way it is frustrating.

I do not seem to be able to locate any of the code online which would be very useful.

The comments by previous reviewers regarding code being incorrect comes as no surprise, and whilst I appreciate that it is character building, so is living in poverty, it doesn't necessary mean that it is ideal.

O'Reilly, take note... each time you send a book to print with mistakes in the code, you lose your good reputation and eventually customers. Sort it out.