This book begins by posing questions in the way that "The Anomaly" does, and like that book, it unfolds, at first, on a plane, and then follows the passengers' stories. (I do think Moriarty was VERY influenced by "The Anomaly" given all the similarities, and decided to write the "beach read", or (no joke) "airplane read" version, although her core plot premise is original.)
A woman, seemingly unremarkable, stands up on a plane flight, and informs each passenger when and how they will die. She seems, of course, insane, or under the influence of something. But...could she actually have the power to see how a life will end? As things unfold, this seems....increasingly possible.
The questions here are great and provoking: would YOU want to know when you will die? And/or how? What would you do, if you had this information? Is fate real? Can we change the future? And so on.
The novel follows certain passengers, whom of course you start to care about and wonder if their fate will unfold as predicted, and Moriarty writes this very well. (The book also hops a LOT from person to person and from time to time, which can be a bit tough to follow (especially on Kindle). If you don't like this kind of story construction, be aware.)
I had two favorite parts of "Here One Moment": the thought-provoking, life-questioning twister/thriller piece (again, like The Anomaly) and the beautifully written portrayal of one particular story of love and loss, which is lyrical and heartbreaking, if a little long-winded. The big issue, though, is that this book tries to be these two things at once. Because of this, when the storylines eventually tied together, for me, it didn't work. I feel the ending could have been more satisfying - it's a just-miss.