The book refers to thinkstats.com site. This site isn't accessible from my computer, neither it is indexed in Google, since search for "site:thinkstats.com" returns 0 results

thinkstats.com forwards to greenteapress.com/thinkstats, so that's why it doesn't show up in Google. But the forwarding works for me. Can you tell me about the environment (OS, browser, etc) where you have this problem. Also, does http://thinkstats.com work for you?

It works now. Maybe I missed something when I was posting this issue. Thank you for the book

Glad to hear it, and thanks for the report.