I don't know quite how to rate this one, so I went for 4 stars. This is likely to be more a collection of disparate thoughts rather than a cohesive review of any kind.
Most people are not going to find Other Minds a 'popular' science book. It's not dry, but it is dense. The author merges what is currently known in evolutionary science with philosophy, and has written what is largely a thought experiment on the concept of consciousness and it's origins, and not just for the octopus; this covers all life. Octopuses get more page time than other creatures, but still only make up about ... 40%, maybe 50%? Not quite what I was expecting, but I was willing to go with it.
I listened to the audiobook, although I have the hardcover as well. The narrator, Peter Noble, does an excellent job with the narration; his voice is crisp and clear and he reads it as though he has a thorough grasp of the material.
But ... I don't know if it was me or if the title of the book was too open to interpretation, but I did not realise how deeply philosophical the material was - this made the audiobook very challenging for me; I'm not a fan of other people's thought experiments in general, so I really struggled with a wandering mind as I listened to this book. I understood the general concepts he covered, but whole sections of the narration would just wash right over me before I'd realise my consciousness checked out.
Conclusion: I'd have been better off reading the physical edition, I think. It's a very well written book, but it's heavy material for someone like me, for whom listening requires a conscience effort. I'll likely re-read my hardcover sometime soon, so I can determine how much I missed, and give my mind a chance to reinforce some of the points I found most interesting.