First, If you want to know where I’ll be signing, check the signings link on the site. That’ll tell you what cities/countries I’m visiting. If it’s not listed, I’m not going there, at least not any time soon.
Secondly, I really enjoy doing signings — meeting readers is one of the best parts of my job — and I make every effort to make myself available to do them. The thing is: writers do not generally choose where they go on tour. Tours are set up by publishers, not writers. I do not choose where I go on tour. I can’t emphasize that enough.*
*[This is especially true when it comes to foreign countries. (If I wanted to tour Spain, for instance, I wouldn’t know where to start — I don’t speak Spanish, I wouldn’t know where bookstores are, what bookstores might want to have me, wouldn’t be able to provide myself a translator, wouldn’t be able to set up media and travel. Publishers do all that.) Therefore, in order to tour Spain (just as an example) I would need my publisher to invite me, and to set all that up.
However, the only tour signings I’m aware of are the ones on the signing page. If it’s not on the signing page, it doesn’t mean I’m not going, it just means I don’t know yet. The moment I do know, I put that info on the page. So if “Georgia” isn’t on the signings page, it’s absolutely definite that my only answer to the question “Are you going to sign in Georgia ever?” is gonna be “I don’t know.”