| Aurora Rising | Jay Kristoff | novel | 2019 |
| Aurora's End | Amie Kaufman | novel | 2021 |
| Aurora's End | Jay Kristoff | novel | 2021 |
| Aus dem Nachlaß des Grafen C. W. Ein Gedichtkreis | Rainer Maria Rilke | posthumous-poetry-cycle | 1950 |
| Aus Indien | Hermann Hesse | travel-writing | 1913 |
| Aus meinem Leben: Dichtung und Wahrheit | Johann Wolfgang von Goethe | memoir | 1811 |
| Aus Taschen-Büchern und Merk-Blättern – in zufälliger Folge – 1925 | Rainer Maria Rilke | posthumous-prose-collection | 1950 |
| Aussie Battlers | Michael Page | children's-book | 1982 |
| Aussie Sickos | Simon McHardy | novella | 2021 |
| Austenland | Shannon Hale | novel | 2007 |
| Austerlitz | W. G. Sebald | novel | 2001 |
| Authority | Jeff VanderMeer | novel | 2014 |
| Authority and the Individual | Bertrand Russell | book | 1949 |
| Authorship | Peter Hobley Davison | edited_collection | 1978 |
| Auto da fé. Cronache in due tempi | Eugenio Montale | essay_collection | 1966 |
| Autobiography | G. K. Chesterton | memoir | 1936 |
| Autobiography | Yevgeny Zamyatin | memoir | 1922 |
| Autobiography of a Family Photo | Jacqueline Woodson | novel | 1995 |
| Autobiography of Red: A Novel in Verse | Anne Carson | novel-in-verse | 1998 |
| Autobiography of the Eye | Paul Auster | poetry-and-prose | 1993 |
| Autoboyography | Christina Lauren | novel | 2017 |
| Autocracy and War | Joseph Conrad | political-essay | 1919 |
| Autocracy, Inc.: The Dictators Who Want to Run the World | Anne Applebaum | political nonfiction | 2024 |
| Autolycus | Euripides | satyr-play | Date unknown |
| Automatic Noodle | Annalee Newitz | novella | 2025 |
| Autonomous | Annalee Newitz | novel | 2017 |
| Autopsy | Patricia Cornwell | novel | 2021 |
| Autour de la Lune | Jules Verne | novel | 1870 |
| Autre étude de femme | Honoré de Balzac | short-story-collection | 1842 |
| Autumn | Ali Smith | novel | 2016 |
| Autumn and Winter Writings | Yukio Mishima | essay-collection | 1964 |
| Autumn Bones | Jacqueline Carey | novel | 2013 |
| Autumn Street | Lois Lowry | novel | 1980 |
| Autumn to Autumn and Selected Poems 1953–1976 | Al Álvarez | poetry-collection | 1978 |
| Aux urnes, citoyens ! Chroniques 2012-2016 | Thomas Piketty | essay-collection | 2016 |
| Available Dark | Elizabeth Hand | novel | 2012 |
| Available Light | Warren Ellis | nonfiction-collection | 2002 |
| Avalanche | Mercedes Lackey | novel | 2018 |
| Avalanche Pass | John Flanagan | novel | 2010 |
| Avalon High | Meg Cabot | novel | 2005 |
| Avalon High: Homecoming | Meg Cabot | graphic-novel | 2008 |
| Avalon High: Hunter's Moon | Meg Cabot | graphic-novel | 2009 |
| Avalon High: The Merlin Prophecy | Meg Cabot | graphic-novel | 2007 |
| Avalon Tower | C.N. Crawford | novel | 2024 |
| Avant et après | Jacqueline Harpman | dialogue | 2008 |
| Avant-Propos de La Comédie humaine | Honoré de Balzac | essay | 1842 |
| Avatar Legends: City of Echoes | Judy I. Lin | novel | 2025 |
| Avatar Review | Greg Egan | essay | 2009 |
| Avatar: The Last Airbender — North and South, Part 1 | Gene Luen Yang | graphic-novel | 2016 |
| Avatar: The Last Airbender — North and South, Part 2 | Gene Luen Yang | graphic-novel | 2017 |
| Avatar: The Last Airbender — North and South, Part 3 | Gene Luen Yang | graphic-novel | 2017 |
| Avatar: The Last Airbender — Smoke and Shadow, Part 1 | Gene Luen Yang | graphic-novel | 2015 |
| Avatar: The Last Airbender — Smoke and Shadow, Part 2 | Gene Luen Yang | graphic-novel | 2015 |
| Avatar: The Last Airbender — Smoke and Shadow, Part 3 | Gene Luen Yang | graphic-novel | 2016 |
| Avatar: The Last Airbender — The Promise, Part 1 | Gene Luen Yang | graphic-novel | 2012 |
| Avatar: The Last Airbender — The Promise, Part 2 | Gene Luen Yang | graphic-novel | 2012 |
| Avatar: The Last Airbender — The Promise, Part 3 | Gene Luen Yang | graphic-novel | 2012 |
| Avatar: The Last Airbender — The Rift, Part 1 | Gene Luen Yang | graphic-novel | 2014 |
| Avatar: The Last Airbender — The Rift, Part 2 | Gene Luen Yang | graphic-novel | 2014 |
| Avatar: The Last Airbender — The Rift, Part 3 | Gene Luen Yang | graphic-novel | 2014 |
| Avatar: The Last Airbender — The Search, Part 1 | Gene Luen Yang | graphic-novel | 2013 |
| Avatar: The Last Airbender — The Search, Part 2 | Gene Luen Yang | graphic-novel | 2013 |
| Avatar: The Last Airbender — The Search, Part 3 | Gene Luen Yang | graphic-novel | 2013 |
| Avatarex | Grant Morrison | graphic-novel | 2016 |
| Avempartha | Michael J. Sullivan | novel | 2009 |
| Avenged | Amy Tintera | novel | 2017 |
| Avenger | Frederick Forsyth | novel | 2003 |
| Avengers Assemble | Brian Michael Bendis | graphic_novel | 2012 |
| Avengers Assemble: The Forgeries of Jealousy | Warren Ellis | graphic-collection | 2014 |
| Avengers by Jason Aaron, Volume 1: The Final Host | Jason Aaron | graphic-novel | 2018 |
| Avengers by Jason Aaron, Volume 10: The Death Hunters | Jason Aaron | graphic-novel | 2022 |
| Avengers by Jason Aaron, Volume 11: History's Mightiest Heroes | Jason Aaron | graphic-novel | 2023 |
| Avengers by Jason Aaron, Volume 2: World Tour | Jason Aaron | graphic-novel | 2019 |
| Avengers by Jason Aaron, Volume 3: War of the Vampires | Jason Aaron | graphic-novel | 2019 |
| Avengers by Jason Aaron, Volume 4: War of the Realms | Jason Aaron | graphic-novel | 2019 |
| Avengers by Jason Aaron, Volume 5: Challenge of the Ghost Riders | Jason Aaron | graphic-novel | 2020 |
| Avengers by Jason Aaron, Volume 6: Starbrand Reborn | Jason Aaron | graphic-novel | 2020 |
| Avengers by Jason Aaron, Volume 7: The Age of Khonshu | Jason Aaron | graphic-novel | 2021 |
| Avengers by Jason Aaron, Volume 8: Enter the Phoenix | Jason Aaron | graphic-novel | 2021 |
| Avengers by Jason Aaron, Volume 9: World War She-Hulk | Jason Aaron | graphic-novel | 2022 |
| Avengers Disassembled: Iron Man | John Jackson Miller | graphic-novel | 2004 |
| Avengers Forever, Volume 1: The Lords of Earthly Vengeance | Jason Aaron | graphic-novel | 2022 |
| Avengers Forever, Volume 2: The Pillars | Jason Aaron | graphic-novel | 2023 |
| Avengers Prime | Brian Michael Bendis | graphic_novel | 2010 |
| Avengers vs. X-Men | Matt Fraction | comic_collection | 2012 |
| Avengers West Coast | John Byrne | comic-series | 1989 |
| Avengers: Beyond | Derek Landy | graphic-novel | 2023 |
| Avengers: Disassembled | Brian Michael Bendis | graphic_novel | 2004 |
| Avengers: Everybody Wants to Rule the World | Dan Abnett | novel | 2015 |
| Avengers: Red Zone | Geoff Johns | graphic_collection | 2004 |
| Avengers: Scarlet Witch | Dan Abnett | graphic-collection | 2015 |
| Avengers: The Search for She-Hulk | Geoff Johns | graphic_collection | 2004 |
| Avengers: Twilight | Chip Zdarsky | limited-comic-series | 2024 |
| Avengers: World Trust | Geoff Johns | graphic_collection | 2003 |
| Avengers: X-Sanction | Jeph Loeb | graphic_novel | 2011 |
| Avengers/Invaders | Alex Ross | graphic-series | 2008 |
| Avengers/Iron Man: Force Works | Dan Abnett | graphic-collection | 2016 |
| Aventure de la mémoire | Voltaire | philosophical tale | 1773 |
| Aventure indienne | Voltaire | philosophical tale | 1764 |
| Aventures de trois Russes et de trois Anglais | Jules Verne | novel | 1872 |