This book contains two deadly secrets.
Deadly secret number one has to do with what the book's major characters will discover when they travel down the time-tunnel that forms one endless end of the interior of The Store, an asteroid that suddenly appears in our solar system one day and which contains relics of the future. Think 'Rendezvous with Rama' with the science ramped up several notches and the interest level ramped down by a similar amount.
Deadly secret number two has to do with the fact that this book was written at all: It probably shouldn't have been!
There are so many 'major' characters that all of them end up getting short shrift, with a consequent two-dimensionalism that makes them of no interest whatsover. We're never allowed to care about them.
There is so much 'hard science' that the speculations about possible anomalies in the space-time continuum overwhelm whatever small story idea was present in the first place. If I do say so myself, I am not an unintelligent reader. I'm no physicist, but I do know enough physics to enjoy the aforementioned Clarke book, and other hard science authors such as Larry Niven. But the physics in this book are so far over my head that I can't tell whether they're above or below me. In fact, I suspect they're a bit over the author's head, too.
My final complaint has to do with this author's fascination with
The End of the World as We Know It. In this and other books, he seems absolutely obsessed with the idea of blowing the world up in one way or another. If you don't mind, I think I'd rather blow up the book!