Centenary Separation (Watchbearers, Book 2) - James Litherland

—Lost in Time

BELIEVING they’ve fixed the master time-travel device, in 2002 Matt and Page take a test trip ten years into the future with their colleague Turner and his new bride along for the ride—but instead of arriving together, the four are separated and scattered in time.
    Matt and Page both materialize in 1912 San Francisco—only a couple of weeks apart, but unable to reunite.  Turner lands in 1962, in the middle of the desert and with little hope of survival, while his wife Verity is the only one to arrive in 2012—alone, and with no idea what’s happened.
    Anya’s assistant Nye, left on her own in New York City to continue her research without supervision, gets mistaken for a terrorist, while sensible Anya travels back to the summer of 2000 to break all the rules and try to do the impossible—change her own past.