Non-Rectangular Notebooks

I can’t fathom why, but a company called Triangle Notebook makes, well, guess.

The hardcover notebook has 160 ruled pages and runs $33.

Even more bizarre is this Sidekick Notebook they offer:

It’s also hardcover, but features 160 dot-grid pages and runs $24. I guess it would come in handy for sketching, if you’re designing boomerangs.

Source: core77