Like 2001 and it’s sequels, “Time’s Eye” is driven by the intervention in human affairs by unknowable and very powerful alien beings. In a flash, the Earth is divided up in chunks from different times. A UN helicopter crew from 2037, a British Colonial detachment in Afghanistan, the armies of Alexander the great and Genghis Khan are all shoved together onto the same Earth, in the same general area. Overlooking these humans and their reactions to the discontinuity are reflecting spheres hovering above the ground, inscrutable and silent.
While there is some focus on attempting to solve the mystery of the events which have brought the protagonists to this, the main thrust of the story is rather typical alternate history fare, much like 1632 or Island in the Sea of Time. Frankly this aspect has been done better. I did find, however, that Clarke and Baxter manage to infuse the characters with a sense of their place in time and space. Unlike many other alternate history stories, this one does not revel in, or lose itself in, the practicalities of the events. Sure, the “modern” humans introduce the stirrup and steam engines, but unlike with Stirling (who, to be fair, I much enjoy reading) the alternate history angle does not seem to be the actual point.
Time’s eye shows hints of what the superhuman beings behind the “Eyes” are actually doing. It is cruel indeed, but seen as necessary. So do the means really justify the ends?