I've started compiling my list. So far I fancy reading or re-reading:
The White Tiger, Aravind Adiga
Beloved, Toni Morrison
Midnight's Children, Salman Rushdie
Lucky Jim, Kingsley Amis
Kafka on the Shore, Haruki Murakami
The Amazing Adventures of Kavalier and Clay, Michael Chabon
The Road, Cormac McCarthy
Blood Meridian, Cormac McCarthy
The Bell Jar, Sylvia Plath
Herzog, Saul Bellow
V., Thomas Pynchon
Wide Sargasso Sea, Jean Rhys
The Master and Margarita, Mikhail Bulgakov
Do Androids Dream of Electric Sheep?, Philip K. Dick
Are You There, God? It’s Me, Margaret, Judy Blume
The World According to Garp, John Updike
Rabbit, Run, John Updike
Invisible Cities, Italo Calvino
The Dispossessed, Ursula K. Le Guin
Ulysses, James Joyce
Ragtime, E.L. Doctorow
A Book of Common Prayer, Joan Didion
The White Album, Joan Didion
The Sea, The Sea, Iris Murdoch
A Confederacy of Dunces, John Kennedy Toole
The Name of the Rose, Umberto Eco
Cathedral, Raymond Carver
The Wasp Factory, Iain Banks
Neuromancer, William Gibson
The Handmaid’s Tale, Margaret Atwood
The Black Book, Orhan Pamuk
The Golden Compass, Philip Pullman
Harry Potter and the Sorcerer’s Stone, J.K. Rowling
Austerlitz, W.G. Sebald
The Golden Notebook, Doris Lessing
Things Fall Apart, Chinua Achebe
The Women's Room, Marilyn French
A House for Mr Biswas, V S Naipaul