To Die a Thousand Deaths by Hal Emerson

Timothy Dark discovered human teleportation only to immediately condemn it. After the first and only human trial, conducted on himself, he sabotaged his machine, resigned from his position at the Scientific Agency for Genetic Exploration, and demanded the destruction of his life’s work. His superiors appeared to acquiesce, and so he vanished. Now, one year later, his machine has been stolen. Facing a personal loss that has left him reeling, Dark is forced to return to SAGE in order to recover the Helix and confront his demons. Reuniting with those he left behind, he’s forced into a race against time, where he and the SAGE team must reclaim the stolen machine from a terrorist group bent on destructive world change - or risk ushering in a new world order. But his misgivings remain, and his reason for leaving still looms large: The Helix broke him, and it will break anyone else who tries to use it.

Cicero James, Miracle Worker by Hal Emerson

My name is Cicero James, and I died last Thursday. I know how it sounds, and the rest of what I have to tell you is just going to make it worse. But it's true. I died, and I came back. And the rest of it—why it happened, what it means, and most importantly what we’re going to have to do about it—is what I need you to hear. I’m going to start at the beginning, and I’m going to tell all of this as faithfully as possible. I’m going to try to bring you along for the ride. It’s all coming out in a rush, so if I don’t tell it quite right, or if I muff a word or use bad grammar or something, try not to hold it against me. And if I don’t manage to convince you… I understand. No harm, no foul, no hard feelings. This is all insane to anyone who hasn't lived it. But if you're in, then you’re in, and here we go.