Sugene has a unique selection of stationery and also a cool "pen pal pack" that has an assortment of cool stickers and envelopes. I have never read a "zine" before (which is an inexpensively produced, self-published, underground publication) but the issue #12, "The Letter Writing Issue" seemed intriguing, so I received it today and read it cover to cover. It's like it was written just for me! Anecdotes, envelope-decorating, fountain pens, letter folding, and some great vintage information from correspondence from years ago. You should check it out.
