If you don't mind another non-American suggestion, how about any Roald Dahl? I saw someone has already mentioned Matilda, but there are lots to choose from and they're pretty accessible.
I like the Harry Potter idea too, though if it was me I'd get it in English, but only because I lived in Taiwan for 5 years and know the book sold really well in translated version there. There's an outside chance she may have read it already in Thai. However, I have never been to Thailand and know zero about the likelihood of 'non-readers' reading Harry Potter the way they did/do over here, so I've no idea if my opinion on that is valid!
Good luck and fun choosing!
I like the Harry Potter idea too, though if it was me I'd get it in English, but only because I lived in Taiwan for 5 years and know the book sold really well in translated version there. There's an outside chance she may have read it already in Thai. However, I have never been to Thailand and know zero about the likelihood of 'non-readers' reading Harry Potter the way they did/do over here, so I've no idea if my opinion on that is valid!
Good luck and fun choosing!