I'll probably stop at 11 and wait until either 13 is out and read the next two straight through, or possibly wait until the entire next arc is finished. Based on the previous format, that will take the entire series up to 15 books, which I think is a good number to finish at. Since the next four-book arc is called 'The Victory' I'm guessing this is where the Sabbat Worlds Crusade finally wins, although no doubt at great cost and only through great heroism etc

There'll be some kind of overview post about the entire series in the near future as well.

Abnett has written a number of other books in the WH40K universe but not involving the Ghosts, which I hope to get to in time. His EISENHORN and RAVENOR trilogies are highly recommended, so I daresay I'll try those at some point.