An amazing book at octopusses and celaphopods in general; how their brains and nervous systems developed while they are on a very different biological branch, and as such might be the truest alien minds we will ever meet.
At times the biological background became a bit much. I must admit skipreading through these sections.
"[Inner speech] is a way of walking through the consequences of actions, a way to bring reasons to bear against temptations. [...] The sounds we cook up in our heads, including the sounds of words, are broadcast in our minds in something like the way that many ordinary perceptual experiences are broadcast. Once a sentence of inner speech is compaosed, it is expose to the same sort of processing that would apply to a sentence we hear. A novel combination of ideas, or an exhortation to act, its htus made available for consideration; it can have the same sort of effect that an ordinary spoken sentence can have."
