Every summer (and some winters), I pick a theme and read three books on that theme.
Here are the lists so far.

 Walter Benjamin

Walter Benjamin

Summer 2008: Girls
Tolstoy, Anna Karenina
Austen, Emma
Brontë, Jane Eyre

Summer 2009: Things Fall Apart
Döblin, Berlin Alexanderplatz
Garcia Marquez, 100 Years of Solitude
Faulkner, Sound and the Fury                                                                              

Summer 2010: William Faulkner
Faulkner, Sound and the Fury
Faulkner, Light in August
Faulkner, Sanctuary

Summer 2011: Wo-Man Booker Prize Winners
Byatt, Possession
Enright, The Gathering
Hulme, The Bone People

Summer 2012: Thatcher’s Boys
Amis, London Fields
Hollinghurst, The Swimming-Pool Library
Barnes, Flaubert’s Parrot

Winter 2012-2013: Books for My Seventeen-Year-Old Self
Maugham, Of Human Bondage
Hesse, Siddhartha
Camus, The Stranger

Summer 2013: The Ivory Tower
Nabokov, Pnin
Amis, Lucky Jim
Jarrell, Pictures from an Institution

Summer 2014: The Gay South
Gurganus, The Oldest Living Confederate Widow Tells All
McCullers, The Heart is a Lonely Hunter
Price, A Long and Happy Life

Winter 2014-2015: Books About Boats
Bengtsson, The Long Ships
Golding, Rites of Passage
Melville, Moby-Dick

Summer 2015: Gender Trouble in Austria (in honour of Conchita Wurst)
Zweig, The Post-Office Girl
Musil, The Confusions of Young Törless
Rilke, The Notebooks of Malte Laurids Brigge

Winter 2015-2016: Socialism
Poole, The Harbor
Tressell, The Ragged Trousered Philanthropists
Reed, Ten Days that Shook the World

Summer 2016: Taciturn Morrison
Morrison, Jazz
Morrison, Sula
Morrison, Home

Winter 2016-2017: Unfinished Books
Ellison, Juneteenth
Soseki, Light and Darkness
Camus, The First Man

Summer 2017: >1000
Hugo, Les Misérables
Tolstoy, War and Peace
Seth, A Suitable Boy

Winter 2017-2018: Full of Sound and Fury (Titles from Macbeth)
Marias, A Heart so White
Bowles, Let it Come Down
Ginzburg, All our Yesterdays

Summer 2018: Tiny Island Lit
Lovell, Fire in the Canes
Goh Poh Seng, If we Dream too Long
Shiel, The Purple Cloud