This series needs a JP-EN translator to continue.
I had to bum this script off of someone a while ago. If a new translator never shows up, there's at least a Japanese->Russian->English translation on Batoto. I can't vouch for the translation accuracy, but the dialogue in Houseki is pretty simple, so you should be able to understand what's going on.
Volume 5 should be coming out soon. If you'd like to buy it, here is a good store.