YOU HAVE IN YOUR HANDS the entire Circle Series with an all new ending to Green which brings complete closure to the series.
Originally Green was seen as Book Zero, an entry point into the series and as such the ending was an intellectual mind bender. That original ending follows the new ending for Green—have some fun with it. But seeing that you clearly started with Black and are ending here with Green I think I owe you a final climax.
Either way, enjoy the read. Dive Deep. I promise you a trip you will not soon forget.