The decision to head to a trilogy..
They say things come along in three's....When I first commenced my journey along the crest of The Seventh Wave (see what I did there?) I knew there was a chance that the book would be large - I've never used ten words when three hundred would do....but little did I know it could provide enough for a trilogy.
The original concept, The Seventh Wave had now become the over-arching group name for the trilogy and will most likely become the title of the final book in the series.