I only read "The Order of Time" by him but it was very mind-bending to me. Paraphrased below.

He argues that time arrow (mostly) does not exist in classical or quantum physics, all equations run as well forward in time as backward.

The only area different is thermodynamics, and there he argues it is all due to our feeble mental capabilities. If we could observe and track each molecule's movement, time arrow would disappear again, we could easily run the system backwards.

He concludes that time is just a consciousness' invention to help make sense of the observed chaos. A more powerful mind would have no use for time.