I'm not surprised that Goodreads recommends J.M. Coetzee to readers who enjoyed this, because my experience of J.M. Coetzee was similar to my experience with this book, which was "Yes, a very good writer but ewwwwwwww!"
I have not read Ian McEwan before, and if all his books are like this, I'm unlikely to try him again. I don't mind a disturbing book with unlikable characters who do disgusting things, but you have to give some reason to want to keep reading besides just admiring how skillfully the writer describes these sick, damaged people, and all I thought about as I read The Cement Garden was that I was glad it was short because I wanted to get through it and be done with it.
The plot is very simple: four children live alone in an old house after both their parents died. They've managed to keep secret the fact that they're orphans, so rather than be put "in care" as the Brits say, they now have the house all to themselves, thanks to regular payments from some account their mother set up before she died which the oldest girl, Julie, collects from the post office.
Being a family that was already dysfunctional before their parents died (the older three were already playing incestuous "doctor" games), they pretty much turn feral once they no longer have adult supervision. The two girls, Julie and Sue, are relatively "normal" in the sense that they can present themselves as ordinary functional human beings; Julie is very pretty, is the only one who goes out, and soon she has a "bloke," an older man who is bound to bring complications into this tidy arrangement. Sue, the second-youngest, spends all her time scribing grim thoughts in her journal.
Meanwhile, Jack, the first person narrator, stops bathing or changing his clothes, and much of the book is spent dwelling on the details of the filth beneath his fingernails, his acne, and his masturbatory habits, this being pretty much his sole pastime aside from slouching around the house inflicting his stench and his bad attitude on his siblings. Tom, the youngest boy, bullied at school, first decides he wants to be a girl, because girls don't get hit (his sisters try to disabuse him of this notion, to no avail, but then encourage him in his cross-dressing), and then decides he wants to be a baby again, which Julie cheerfully facilitates.
Meanwhile, Jack is clearly obsessed with older sister Julie in a non-fraternal way, and while Julie seems normal, even motherly, on the surface, being what passes for the voice of reason and authority in this broken household with dishes moldering in the kitchen, she clearly enjoys the power she has over her brother and is learning how to subtly push those buttons.
It is hard to imagine any of these creatures growing up psychologically healthy.
Their dystopian Never Never Land might go on indefinitely, except that there is a little secret in their cellar, hinted at by the title, and since none of the kids are big on smarts or planning, it is bound to end badly.
By the end of the book I was about as grossed out as I have ever been by a book not written by Robert Heinlein or Piers Anthony.
My problem, and the reason I am giving The Cement Garden 2 stars despite being written by a Man Booker Prize winner, is that I failed to see the point and utterly failed to enjoy anything about it. It's a macabre, almost gothic tale set in that grim, stark English urban landscape that Pink Floyd was singing about back about the same time McEwan wrote this. It's skillful and unsettling and maybe that's all McEwan intended, and surely there are people who like books that exist only to twist all their revulsion dials. But I wanted to drink bleach after reading this, and I'm only giving it 2 stars rather than 1 because I cannot deny it's very well-written and very effective at impacting the reader.