Introducing HTML5: A Book From the Future

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Today I received the highly praised book “Introducing HTML5” by Bruce Lawson and Remy Sharp. I was pretty surprised, when I opened it and found out that this book must have come from the future. The first page tells me that its copyright is from 2011. How is that possible? Is that a typo or is that just due to the futuristic nature of the topic? Is it safe to read it now or do I have to wait till next year?

Update: I just received word from Peachpit, saying that any of their books published after June carry the next copyright year. Thanks. That was quick.