Officially we have no word on a release schedule beyond the fact that Run Faster seems to be the next one down the chute. We know that the Matrix book will be called Data Trails, but that's all we know about that book. I believe the plan is to try to get Run Faster out for Christmas, but no other books have a chance to be out any earlier than January (and most likely will come out some time after even then). Also, it might be a misnomer to refer to the books that haven't been written or published yet as "missing." Catalyst pushed a really aggressive publishing schedule and it backfired (at least a bit). So expect new releases to take longer to come out - probably on an order of 2-3 books per year instead of 5-6.