Well, this is a book written by a run-off-the-mill programmer, that happened to work at Apple and was invited a few times to make demos for Steve Jobs during the iPhone development.

From this, he tries to make a book (which is OK), but sadly lacking in any valuable content or insights (except what any semi-intelligent programmer would get after a few years of experience).

Nothing Apple-specific in this book. You can miss it without regret.