… by Arthur C. Clarke and Stephen Baxter.
From the dust jacket (paraphrasing some of it, quoting some): A wealthy industrialist harnesses quantum physics to use wormholes to enable people to see one another at all times. This results in the complete elimination of privacy, forever. As society copes with the shock of this, the same technology proves able to look back in time, too. Nothing prepares people for what follows: “the wholesale discovery of the truth about thousands of years of human history. Governments topple, religions fall, the entire edifice of human society is shaken to its roots. It is a fundamental change in the terms of the human condition… cause for despair, provocation for chaos, and- just maybe- opportunity for transcendence.”
I’m about 20% into it… it’s proving to be a compelling story, even if it sounds rather frightening. 
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