Save yourself the uncertainty, tell her you have followed her 'book and you want some shagging, anyway.
Be direct, now that you've been there.
I've never shagged her before; she just expressed an interest in doing it with me on a fair number of occasions, but then she went off to Wales and I heard very little from her for months and months, so I assumed she'd met someone or otherwise lost interest in me.
Ahh!
That's completely different, then.
I would still be somewhat direct and ask a few questions, to "catch up." Avoid any lame shit like "Why haven't you called me?" or "What about the guy you talked about in your 'book?" or assuming that you can pick up where you left off last time. Instead, ask about the fun she has had, the sites she has seen in her travels and what she has been up to. Show interest in her lifestyle and gather information. If she is still interested in you, you will know very shortly by whether her answers include things that interest you or if her conversation becomes a way for her to break it to you that she is becoming attached to the other guy. She still holds all the cards, so you have to slowly re-kindle what you had before without seeming too anxious.
It's a tough row. Amazing things can happen after a Hello kiss, though.