This is Deep History told in a concise, relatively engaging way (it is a book of science after-all so it’s mostly a long essay to propose and back-up a rather simple – even obvious – but also somewhat heretical hypothesis), with short chapters making the abundance of information easier to digest. I like the author’s style; he doesn’t dumb it down and builds his case with a very thorough foundation in explaining the intricacies of Earth’s amazing (probably too amazing for coincidence) evolution.
And that’s the heretical part in a nutshell, that Life evolves in unequal ways across time and space (for instance life evolving in competition/cooperation with other life forms leads to an accelerated pace while life evolving in natural selection to physical environmental pressures/conditions evolves at steady rates). The implication is that Life is self-organizing and self-generating (and thus not "random"). Personally, I find it refreshing to have a reputable scientist exploring this line of thinking, as science without it is increasingly intellectually (and spiritually) stunted. I’m a little surprised that it hasn’t been done more, but perhaps Russell’s expertise in the long time frames of paleontology made these creative leaps more likely, anyways, good for him. Now I’m intrigued to research how well his ideas were received, and if he was blacklisted within his field as a result.