Given the myriad obsessions in the world that have resulted in single-topic web pages, we probably shouldn’t be surprised by a site devoted to nothing — nothing! — but a very specific category of notebook. But we are. The Black Cover blog searches for perfection in a product that was pretty swell to begin with: The pocket-sized black journal, seen most frequently in stores in hugely popular versions made by Moleskine (pictured; $11 at Amazon). While the site’s anonymous authors are fairly fond of that brand (and other bloggers are happy enough with it to make it their sole topic), they do have nits to pick: It’s slightly too big for their pockets; its stiff covers make it a drag to sit on and and so on. So they’re reviewing every similar journal out there, with painstaking critiques of paper stock, bookmark style and every other design choice. It’s a perfect case of someone else doing all the legwork for you, helping you make smarter purchases in an arena where you’d probably be inclined just to take what’s offered and give it no more thought, even if that left you vaguely unsatisfied. Note-takers whose aesthetic sense doesn’t dictate an all-black book, though, should look elsewhere on the Web, where they’ll find, among others: handmade all-white mini-pamphlets made from recycled Braille magazines ($10); Moleskine-sized, one-of-a-kind Flukebooks ($15) with covers made of discarded screen prints; and the custom boutique Engrave, where for a few bucks more than a plain Moleskine, you can get one that’s laser-etched with either a stylish artist’s design or an image you made yourself.