If you’ve been following the Horizon threads on 4chan, you’d already know that there’s been an effort to translate basically every single bit of Horizon that we can get our grubby little hands on. Including the manga, of course.
Someone uploaded scans of the Kyoukai Senjou no Horizon 4koma Anthology (not to be mistaken with the Kyoukai Senjou no Horako-san 4koma), another anonymous person threw in translations, and Nackbjorn, the redrawer for the Horizon manga (non 4koma) helped with the edits and typesetting.
I myself haven’t contributed to this (asides this scan of the tankoubon cover, not included in the release) however, but I’d just like to promote it since, well, sharing is caring and such. Even if it is merely quasi-legal sharing/caring.
Also Nackbjorn asked me to.