Back in Nov 2011, I ordered a copy of The Art of R Programming (published by No Starch Press). It sat on my shelf for a while and I'd flip through it now and then looking up a few things about R when I needed something. It's a pretty well written book with lots of examples, which I like.
Last night I was looking something up in the index, and when I flipped to the page, I couldn't find it.
Then I noticed it. Somehow, my copy of the book is missing a pretty large chunk of pages (pages 41-88). What amuses me most is that I never noticed until now.
So I fired off an email like he suggested and am waiting to hear back. This is a nice use of Twitter for customer service.
Update: So not only did No Starch send me a PDF copy of the missing pages, but they're also going to ship a new copy of the book to me! That's pretty awesome of them. Thanks No Starch!