Griffin and Sabine (Griffin & Sabine #1)

Griffin & Sabine. A postcard arrives. A reply is sent. Another postcard. And so a friendship is formed. Through letters.

I read this when it was first published (1991?) and now I've read it again. It struck me this as a delightfully novel story, and I find that to be true today.

I wonder if the sequels are at the library. I think I need to look for them.