Book 1 of 4 in the first Star Trek: Section 31 mini-series.
"Six months before their ultimate battle against the Borg for the fate of Earth, Captain Jean-Luc Piccard and the crew of the USS Enterprise™ face a very different kind of crisis. A world in turmoil becomes the focal point of conspiracies and betrayal as an unexpected reunion brings with it startling revelations. Old friends become bitter enemies and one young officer reaches a crossroad when he's forced to choose between the greater good of the Federation and the ideals for which it stands."