The ongoing correspondence of Griffin and Sabine, by Nick Bantock, published in the early to mid-1990s. The series inspired a computer game and a play, and a second series was published later.
Griffin Moss is an artist living in London who makes postcards for a living. He is unhappy and lonely, though he is unaware of these feelings. His life is changed forever when he receives a cryptic postcard from Sabine Strohem, a woman he has never met. Like Griffin, she is an artist (she illustrates postage stamps) and comes from a fictional group of small islands in the South Pacific known as the Sicmon Islands (Arbah, Katie, Katin, Ta Fin, Quepol and Typ). The two begin to correspond regularly.
Every page features a beautifully-drawn facsimile of a postcard or a letter actually enclosed in an envelope. A great "hands-on" read.
In the final volume, the mystery of the two artists deepens and their questions grow more urgent. New obstacles (including a sinister intruder) test the tenacity of their passion, and in each letter or postcard, painting and prose are even more richly intertwined.
These books were all bought new, have been lovingly cared-for, and are in like-new condition.