Ask HN: I want to learn statistics and data mining

I want to learn statistics and data mining. I can't afford to buy many books right now, so I'm asking for one or two on the topic, and also one or two available online, as ordering through amazon would take a month for shipping.

I'd like to get your opinions before spending time on random books. Thanks a lot.

P.S. My math background is not very strong but I'm willing to learn.