Vortex

Vortex tells the story of Turk Findley, the protagonist introduced in Axis, who is transported ten thousand years into the future by the mysterious entities called "the Hypotheticals." In this future humanity exists on a chain of planets connected by Hypothetical gateways; but Earth itself is a dying world, effectively quarantined. Turk and his young friend Isaac Dvali are taken up by a community of fanatics who use them to enable a passage to the dying Earth, where they believe a prophecy of human/Hypothetical contact will be fulfilled. The prophecy is only partly true, however, and Turk must unravel the truth about the nature and purpose of the Hypotheticals before they carry him on a journey through warped time to the end of the universe itself. Vortex is thrilling and complex science fiction novel from Hugo Award-winning author Robert Charles Wilson.

Julie Cross's Vortex is the thrilling second installment of the Tempest series, in which the world hangs in the balance as a lovelorn Jackson must choose who to save Jackson Meyer has thrown himself into his role as an agent for Tempest, the shadowy division of the CIA that handles all time-travel-related threats. Despite his heartbreak at losing the love of his life, Jackson has proved himself to be an excellent agent. However, after an accidental run in with Holly--the girl he altered history to save--Jackson is once again reminded of what he's lost. And when Eyewall, an opposing division of the CIA, emerges, Jackson and his fellow agents not only find themselves under attack, but Jackson begins to discover that the world around him has changed and someone knows about his erased relationship with Holly, putting both their lives at risk all over again.

Julie Cross's Vortex is the thrilling second installment of the Tempest series, in which the world hangs in the balance as a lovelorn Jackson must choose who to save Jackson Meyer has thrown himself into his role as an agent for Tempest, the shadowy division of the CIA that handles all time-travel-related threats. Despite his heartbreak at losing the love of his life, Jackson has proved himself to be an excellent agent. However, after an accidental run in with Holly--the girl he altered history to save--Jackson is once again reminded of what he's lost. And when Eyewall, an opposing division of the CIA, emerges, Jackson and his fellow agents not only find themselves under attack, but Jackson begins to discover that the world around him has changed and someone knows about his erased relationship with Holly, putting both their lives at risk all over again.