As parents well know, the terrible twos are so named for a reason. For authors, publishing date anniversaries — book birthdays – can be equally tricky at the age when a book’s launch buzz is long forgotten and the weight of creative expectations has moved from  crawling underfoot to fluid running.

There might be tantrums.

Or cake and candles.

With Ghost Fleet, the summer of 2017 marked the two-year anniversary since the novel’s launch on June 30, 2015. The book’s recent addition to the Comman...