The Immortal Trilogy [Waller]

Dominick Dunn is in people acquisition. When the phone rings he shuffles off to the far corners of the globe to retrieve the captured, then turns them over to his employer. He doesn't actually believe these people are immortal, but the pay is good and he likes to travel. Despite rumors that his quarry meets an unthinkable fate at the hands of his employer, he's content with his lot in life. Aaron Wessker is miserable. His life has not gone according to plan.

For Edward, immortality has been very lonely lately. After several decades in hiding, he's surfaced to find scarcely any of his kind left. Most importantly, his beloved Beatrix would appear to have succumbed to the sands of time. Curious to learn what might have befallen her, he stalks the last two immortals, Arron and his daughter Jennifer, in hopes of learning her fate. Things are about to get a lot less lonely for dear old Edward. He's stumbled into a battleground between light and darkness.

In book three, The Agreement: A Tale of the Rapture, the gang reunites and strikes a bargain with Gabriel to travel to Hades to retrieve his fallen angel. All this must occur before the trumpets blare or the Agreement is considered null and void. It makes sense after all, the Rapture is the end.