IPhone Developer's Cookbook review

I was going to buy this book until I came across this very poor review of it on http://www.amazon.co.uk/review/R1BLJZBGOHH7F9/ref=cm_cr_pr_v...

I figured http://www.stanford.edu/class/cs193p/cgi-bin/index.php might be a better alternative source to learn iPhone development from - or at least provide a learning environment thats more engaging than a book. It's free also.