But that's no surprise, is it?
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!
Suggested For You
Every Friday, HuffPost's Culture Shift newsletter helps you figure out which books you should read, art you should check out, movies you should watch and music should listen to. Learn more