But that's no surprise, is it?

grumpy cat

grumpy cat

grumpy cat

Yes, Tardar Sauce 'pawtographed' copies of her book, 'Grumpy Cat: A Grumpy Book For Grumpy Days' for hundreds of her fans at the Grove's Barnes & Noble store in LA.

And she wasn't happy about it one bit. Or - wait - was she? It's so hard to tell.

Check out more pictures below. Robert Galbraith, eat your heart out!

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  • Grumpy Cat does not look impressed at her book signing in Los Angeles. (Credit: AKM-GSI)

  • Grumpy Cat does not look impressed at her book signing in Los Angeles. (Credit: AKM-GSI)

  • Grumpy Cat does not look impressed at her book signing in Los Angeles. (Credit: AKM-GSI)

  • Grumpy Cat does not look impressed at her book signing in Los Angeles. (Credit: AKM-GSI)

  • Grumpy Cat does not look impressed at her book signing in Los Angeles. (Credit: AKM-GSI)

  • Grumpy Cat does not look impressed at her book signing in Los Angeles. (Credit: AKM-GSI)

  • Grumpy Cat does not look impressed at her book signing in Los Angeles. (Credit: AKM-GSI)