Although the Muslims in medieval Spain left behind an expansive literature, little of it has been translated into English (although quite a bit has been translated into Spanish and French). Not only is this a readable and interesting history, but the translator has included a lot of well-chosen excerpts of other works in the appendix. It also deals extensively with the Almohads and the last Emirate of Granada, which both tend to be neglected in English-language scholarship.
Basically, a lot of good examples with some lightweight commentary. More famous pieces mixed in with some really interesting, odd, obscure gems that are, in some cases, seemingly ungooglable.
Read it here.
Two book-length epilogues to Homestuck which can be read in any order and foreshadow one another. In spite of that, extremely readable. I couldn't put it down. The fact that he pulled that off so smoothly is extremely impressive.
It's also a real bummer. It's littered with hilarious jokes, but reading it was still an intense, uncomfortable look into all the most pathetic and depressing corners of adulthood, blown up to epic proportions, as opposed to the more high-energy, wacky teen drama of the original.
The endings imply more is coming (or maybe not?) so I'm not even sure what kind of rating I can give to this: a perfect score if he manages to follow it up with something of similar quality. Go read it. Unless you haven't read Homestuck yet, in which case, I'm jealous that you get to read it the first time, from the beginning.