The aforementioned 'The Road' by Cormac McCarthy. Critics lauded it for its bleak yet beautiful portrayal of a post - apocalyptic world. The way McCarthy subtly weaves in the threat of cannibalism as part of the horror of this world is masterful. It's not just about the shock value of the topic but also about the human condition in extreme circumstances.
Well, 'The Left Hand of Darkness' by Ursula K. Le Guin is a must - mention. It's known for its exploration of gender and society in a science - fiction context on the planet Gethen. 'Ringworld' by Larry Niven is also among the best. It presents a gigantic artificial ring in space and the adventures and challenges faced by the characters exploring it. 'Flowers for Algernon' by Daniel Keyes has science - fiction elements in its story of a man whose intelligence is artificially enhanced and then deteriorates, and it has been praised for its emotional depth.
Some of the best critically acclaimed science fiction books include 'Dune' by Frank Herbert. It has a complex and immersive world-building with its desert planet Arrakis and the politics and power struggles around the spice melange. Another one is '1984' by George Orwell, which, while often considered a dystopian novel, also has strong science - fiction elements in its vision of a totalitarian future. And 'Brave New World' by Aldous Huxley, which explores a future society based on genetic engineering and social conditioning.
J.M. Coetzee's 'Age of Iron' is also highly regarded. It's a complex novel set in South Africa during the apartheid era. Coetzee's exploration of moral and political issues in the story is masterful.
Among them, 'The Corrections' was highly acclaimed. It received numerous awards and nominations for its incisive look at family relationships and the state of modern America. Critics praised Franzen's writing style and his ability to create complex, believable characters.
The Song of Achilles' is very critically acclaimed. Critics love how Madeline Miller delved into the relationship between Achilles and Patroclus, adding new layers to the ancient story. 'Fun Home' is also praised for its combination of memoir and fiction elements, and its honest exploration of family and sexuality. 'Aristotle and Dante Discover the Secrets of the Universe' has been commended for its heartwarming story of two boys growing up and their evolving relationship, which is both relatable and poignant.
'All the Bright Places' by Jennifer Niven was also highly regarded. It tackled serious issues like mental illness in a way that was accessible to young adult readers. The relationship between the two main characters was beautifully written and it made readers really feel for them.
One could also consider 'Atonement' by Ian McEwan. Set in different historical periods, it has a complex love story at its core. It's a beautifully written novel that examines themes of guilt, love, and the impact of false accusations. While it has elements of passion and love between the characters, it's not about sex in an improper or overly emphasized way but rather part of the exploration of the characters' emotions within the historical backdrop.