This book has been recently shortlisted for the Irish Book Awards. I'd thought to write a separate piece here, but since I haven't I will just copy and paste my review from my blog:
Having read two of his other books, I can attest that Mr. Burke is quite capable of writing a really good book in the more conventional forms, but that is not what he is setting out to do here. The conceit is that the character "Declan Burke" is visited, while on a writer's retreat, by a character who was thought up for a book that never made it to a final draft. Karlsson--or Billy, as he now apparently wants to be called-- asks to be let out of the limbo that is the fate of an unfinished character. He turns out to be a hard guy to say no to.
I believe I would have been a bit bewildered by this book, which I might have expected to be a caper, though of the darkly comic kind, if I had not been clued in by an early blurb of Adrian McKinty's, mentioning another Irishman who wrote sui generis fiction, Flann O'Brien. Having read O'Brien's The Third Policeman not that long ago myself, I was more prepared for the 'outside the crime fiction box' story than I might have been.
Although much of the book is about the hammering out of a novel between the fictional Karlsson and the, well, equally fictional Declan Burke, the book's dark energy is really Karlsson's, I think. He has a Mephistophelian charisma, if not what you could really call charm. When Karlsson, as Billy, meets Declan Burke at the writer's retreat, he is missing an eye, and sports an eyepatch. I was curious about that throughout the book, and may have missed a beat when it was explained, but an Irishman with an eyepatch always has some relation to Joyce, I suppose. For me, though, and this is just my own take on the thing, the one-eyed nature of Billy has everything to do with his monomania and, forgive the pun, lack of perspective. His relentlessly dark vision of our life on earth is persuasive, at times funny, and yet always bracing. He is the classic case of the guy who is too smart for his own good, by which I mean beyond the reach of help, because this is where he chooses to put himself.
The title of the book refers to the coldest possible temperature, which is more theoretical than actual, in which all energy is frozen. Nothing moves. This reminds me of Dante's version of hell, which is not heat, but ice. Karlsson, who want to bring everything down, is perhaps an agent of such a space, but Karlsson, much as he would like to go his own inexorable way, is, despite himself, still moved by love and loss, even as the book draws toward its close.
Karlsson is certainly an aspect of Declan Burke, for where else could he have come from? But Declan Burke, as either character or author, has learned a thing or two more about life, thanks to marriage and a child, than poor Karlsson ever dreamt of in his philosophies. Karlsson, I think, is aware of the lack.
Don't worry, Karlsson. You can always hope there will be a different sort of ending in the movie.