Given the problem of content copyright, they'll probably make it UK-only. But I do hope I'm wrong.

Also, if they're written at the "level" of Sarah Jane Adventures, those are not young adult/teen books, those are middle-reader books. There's a big difference in the reading audience, writing and vocabulary level, content, and especially marketing. I wish people could keep that straight. (Yeah, I'm a git about that -- the one seriously useless degree [well, except I do actually use it from time to time in my work] I went for was an MA in Children's Literature. :) )