Oh man...
I'm either a sentimental animal-lover at heart or a preternaturally genius mind trapped in the lumpen, inefficient body of a mere animal (I jest, I jest) but this book really did move me in a way that not a lot of genre fiction has done.
Stapledon is best known for his twin individuality-shattering monuments Last and First Men and Starmaker which are probably the two most criminally underlooked examples of speculative fiction in my experience of the genre, particularly the first. I'm not feeling sufficiently demi-godlike to tackle a review of either of those at this hour so instead I'll talk about Sirius.
In line with the aforementioned books, Stapledon is often criticised for a cold, emotionless style of writing, and it's true that his characters (where they are even relevant- and here they certainly are) come across as a little cardboard. Sirius the dog, however, "born with the mind of a man" as the back of my edition somewhat luridly states, is a freak of science that I fell in love with.
The book tracks his progression as the dog grows into maturity along with his creator's daughter, the weirdly named Plaxy. We see many facets of his life, as he ponders religion, language and learning. Some of his attempts to "achieve humanity" are really heartbreaking, and I found particularly crushing his relationships with his bitches (and I'm not being funny) Physically, he's got no problems- it's just to him they are just dumb, rutting animals, nothing more...
It struck me as having a very humanist tone, reminiscent of John Wyndham's work in places, but the ending ensures that we can safely file this alongside Stapledon's other books as a somewhat elegaic musing on what sentient life can struggle with, and sadly, be reduced to.
I suppose it could be argued that Frankenstein and the long line of science fiction in that vein have covered all this ground already, the idea of science creating something beautiful but flawed, and ignorant torch waving mobs and so on...but this is a remarkably thoughtful approach to it, and I really feel that Olaf's analytical genius was reigned in on a different, but no less powerful plane of thinking here.
To those that accuse Stapledon of being a pitiless theoretician, I urge you to read this book, and, to a lesser extent, Odd John .
PS. I must also say that the book made consider the oceans of dreck that make up the "talking animal" sub-genre of children's film in a very different way. Imagine a lamenting Babe, squealing with self-loathing as he wallows in his own filth, his career as a youth worker impeded at every trot...