What happened was, I had a four-book deal. I assumed
Control would be book four.
My editors at Pocket decided my fourth book would be my contribution to the TOS 50th anniversary trilogy,
Legacies.
While that decision was being made, I signed a three-book deal for a series of original novels with
Tor Books.
Consequently, after I write
Legacies, Book II: Best Defense (starting sometime next week, with a deadline in early November), I will be busy writing sequels to my original novel
The Midnight Front through most of 2016.
By the time I am able once again to commit to writing a new
Star Trek novel, I will most likely be jockeying for a spot in the 2018 schedule.