This leads to a French postal ad but the box is pretty neat.
Turkish map fold - part 2
Pliage : Une explosion, ou une bouche
Triangle book tutorial. Step-by-step how-to make a triangle circular folding book, with all image credits to Na Rae Kim, Korean Bookarts Academy, Seoul.
nobilior: “ Just purchased. These Moleskin postal notebooks are a really neat, stylish way to send a letter. 8 pages fold up inside a card outer, and it posts for the price of a normal stamp (so the...
Moleskin postal notebooks