I’ve been following this series for years and the short version is: it doesn’t have a definitive, final ending in print yet, but the publisher and the author have confirmed one more book will close the main arc. The upcoming final volume is titled 'Archangel's Eternity' and is scheduled for release on May 5, 2026; publisher copy and listings describe it as the concluding entry that brings Elena and Raphael back for the final chapter of their story. Plotwise, the last few releases have already moved the timeline dramatically—'Archangel’s Ascension' (book 17) leaps centuries forward and sets up a world-changed canvas for whatever comes next, and the blurbs for 'Archangel’s Eternity' promise a story that picks up after a huge span of time and wrestles with a change that will alter Elena and Raphael’s existence. That means the hero’s arc (Elena—her mortal heart, and Raphael as her archangel partner) is explicitly slated to receive a culminating treatment rather than being left forever open. If you want the emotional gist: expect a resolution that honors the long-running bond between Elena and Raphael while dealing with the cosmic-scale consequences the series has been building toward. The author’s own channels have presented the final book as the “final entry,” with cover reveals and wording that frame it as the close to the Guild Hunter saga. So the hero’s fate will be revealed there—look for a conclusion that ties their millennia-spanning relationship into the larger changes the Cadre and the world face. I’m equal parts nervous and excited to see how Nalini Singh wraps up such a huge, beloved story.