Descendants of Sol will not be out by the end of July, unless wonder comes and helps me out. I have set the release date of 31 September, which is a pessimistic guess; so it's likely it will be out sooner.
Grammar checking is taking more time than I expected. At the moment, 7 missions out of 35 have been grammar checked. I'm assuming the number of edited missions is higher, because one of my checkers said he was making progress, but did not tell me exactly how many missions he has checked. Realistically speaking, the number could be around 10-12 out of 35.
Until then, keep your eyes open for Blue Planet: War in Heaven. Looks like they'll release sooner.