| Who Let the Ghosts Out? | R. L. Stine | novel | 2004 |
| Who Moved My Cheese? For Kids: An A-Mazing Way to Change and Win! | Spencer Johnson | children's literature | 2003 |
| Who Moved My Cheese? For Teens: An A-Mazing Way to Change and Win! | Spencer Johnson | business fable | 2002 |
| Who Moved My Cheese?: An A-Mazing Way to Deal with Change in Your Work and in Your Life | Spencer Johnson | business fable | 1998 |
| Who Put That Hair in My Toothbrush? | Jerry Spinelli | novel | 1984 |
| Who Ran My Underwear Up the Flagpole? | Jerry Spinelli | novel | 1992 |
| Who Rules the World? | Noam Chomsky | political-nonfiction | 2016 |
| Who Sings the Nation-State?: Language, Politics, Belonging | Judith Butler | co-authored-book | 2007 |
| Who Stole My Pension?: How You Can Stop the Looting | Robert T. Kiyosaki | nonfiction | 2020 |
| Who Stole the Wizard of Oz? | Avi | novel | 1981 |
| Who Wants a Cheap Rhinoceros? | Shel Silverstein | picture-book | 1964 |
| Who Was in the Garden | Margaret Atwood | poetry_chapbook | 1969 |
| Who Was Sarah Findlay? With a Suggested Solution | J. M. Barrie | pamphlet | 1917 |
| Who Was That Masked Man, Anyway? | Avi | novel | 1992 |
| Who We Are | TJ Klune | novel | 2012 |
| Who Will Cry When You Die?: Life Lessons from the Monk Who Sold His Ferrari | Robin Sharma | collection | 1999 |
| Who You Were Meant to Be: A Guide to Finding or Recovering Your Life's Purpose | Lindsay C. Gibson | nonfiction | 2000 |
| Who-ology: The Official Doctor Who Miscellany | Cavan Scott | nonfiction | 2013 |
| Who, Said Sue, Said Whoo? | Ellen Raskin | picture-book | 1973 |
| Who's a Good Boy?: Welcome to Night Vale Episodes, Volume 4 | Jeffrey Cranor | script-collection | 2019 |
| Who's a Good Boy?: Welcome to Night Vale Episodes, Volume 4 | Joseph Fink | script collection | 2019 |
| Who’s Afraid of Gender? | Judith Butler | book | 2024 |
| Who's Got Game?: The Ant or the Grasshopper? | Toni Morrison | children's-book | 2003 |
| Who's Got Game?: The Lion or the Mouse? | Toni Morrison | children's-book | 2003 |
| Who's Got Game?: The Mirror or the Glass? | Toni Morrison | children's-book | 2005 |
| Who's Got Game?: The Poppy or the Snake? | Toni Morrison | children's-book | 2004 |
| Who's Had Who: An Historical Register Containing Official Lay Lines of History from the Beginning of Time to the Present Day | Helen Fielding | nonfiction | 1987 |
| Who's That Girl? | Mhairi McFarlane | novel | 2015 |
| Who's Your Mummy? | R. L. Stine | novel | 2009 |
| Whores for Gloria | William T. Vollmann | novel | 1991 |
| Whoroscope | Samuel Beckett | poetry-pamphlet | 1930 |
| Whose Body? | Dorothy L. Sayers | novel | 1923 |
| Whose Story Is This? Old Conflicts, New Chapters | Rebecca Solnit | essay-collection | 2019 |
| Whose Woods These Are: A Horror Short Story | Darcy Coates | short_story | 2014 |
| Why 'A' Students Work for 'C' Students and Why 'B' Students Work for the Government: Rich Dad's Guide to Financial Education for Parents | Robert T. Kiyosaki | nonfiction | 2013 |
| Why Abstract? | Henry Miller | essay | 1945 |
| Why America Is Not a New Rome | Vaclav Smil | book | 2010 |
| Why Are Animals Endangered? | Isaac Asimov | children's-nonfiction | 1992 |
| Why Are Some Beaches Oily? | Isaac Asimov | children's-nonfiction | 1992 |
| Why Are the Rain Forests Vanishing? | Isaac Asimov | children's-nonfiction | 1992 |
| Why Are We at War? | Norman Mailer | essay | 2003 |
| Why Are We in Vietnam? | Norman Mailer | novel | 1967 |
| Why Are Whales Vanishing? | Isaac Asimov | children's-nonfiction | 1991 |
| Why Be Happy When You Could Be Normal? | Jeanette Winterson | memoir | 2011 |
| Why Call Them Back from Heaven? | Clifford D. Simak | novel | 1967 |
| Why Did the Monster Cross the Road? | R. L. Stine | picture-book | 2023 |
| Why Didn't They Ask Evans? | Agatha Christie | novel | 1934 |
| Why Do I Write? An Exchange of Views Between Elizabeth Bowen, Graham Greene and V. S. Pritchett | Graham Greene | essay_collection | 1948 |
| Why Do Men Have Nipples? and Other Low-Life Answers to Real-Life Questions | Katherine Dunn | nonfiction | 1992 |
| Why Do Men Intoxicate Themselves? | Leo Tolstoy | pamphlet | 1890 |
| Why Do We Have Different Seasons? | Isaac Asimov | children's-nonfiction | 1991 |
| Why Does Litter Cause Problems? | Isaac Asimov | children's-nonfiction | 1992 |
| Why Dust Shall Never Settle Upon This Soul | Ryka Aoki | poetry-collection | 2015 |
| Why Fish Don't Exist | Lulu Miller | nonfiction | 2020 |
| Why I Am Not a Christian | Bertrand Russell | pamphlet | 1927 |
| Why I Am Not a Christian, and Other Essays | Bertrand Russell | essay_collection | 1957 |
| Why I Love Black Women | Michael Eric Dyson | nonfiction | 2003 |
| Why I Quit Zombie School | R. L. Stine | novel | 2011 |
| Why I Shout at the Computer Screen | Dean Koontz | essay | 2010 |
| Why I Wake Early | Mary Oliver | poetry | 2004 |
| Why I Want to Fuck Ronald Reagan | J.G. Ballard | pamphlet | 1988 |
| Why I Write | George Orwell | essay_collection | 2004 |
| Why I Write About Elves | Terry Brooks | essay | 2005 |
| Why I'm Afraid of Bees | R. L. Stine | novel | 1994 |
| Why I'm No Longer Talking to White People About Race | Reni Eddo-Lodge | nonfiction | 2017 |
| Why I'm Not Neil Gaiman | Scott McCloud | online short comic | 2001 |
| Why is Nothing Ever Simple? | Jodi Taylor | short-story | 2019 |
| Why Is Sex Fun?: The Evolution of Human Sexuality | Jared Diamond | popular-science | 1997 |
| Why Is the Air Dirty? | Isaac Asimov | children's-nonfiction | 1991 |
| Why Is This Night Different from All Other Nights? | Lemony Snicket | novel | 2015 |
| Why Look at Animals? | John Berger | essay-collection | 2009 |
| Why Modern Manuscripts Matter | Kathryn Sutherland | book | 2022 |
| Why Nations Fail: The Origins of Power, Prosperity, and Poverty | Daron Acemoglu | nonfiction | 2012 |
| Why Nations Fail: The Origins of Power, Prosperity, and Poverty | James A. Robinson | book | 2012 |
| Why Not Me? | Mindy Kaling | memoir | 2015 |
| Why Not Peace Negotiations? | Bertrand Russell | pamphlet | 1916 |
| Why Nudge?: The Politics of Libertarian Paternalism | Cass R. Sunstein | book | 2014 |
| Why Only Us: Language and Evolution | Noam Chomsky | coauthored-book | 2015 |
| Why Orwell Matters | Christopher Hitchens | literary_criticism | 2002 |
| Why Read Moby-Dick? | Nathaniel Philbrick | literary criticism | 2011 |
| Why Shakespeare? | Catherine Belsey | nonfiction | 2007 |
| Why Should I Cut Your Throat & Other Nonfiction | Jeff VanderMeer | nonfiction | 2002 |
| Why Societies Need Dissent | Cass R. Sunstein | book | 2003 |
| Why the Epigraph? | Graham Greene | essay | 1989 |
| Why the Rich Are Getting Richer: What Is Financial Education... Really? | Robert T. Kiyosaki | nonfiction | 2017 |
| Why Thinking People Vote Labour | Bertrand Russell | pamphlet | 1922 |
| Why Translation Matters | Edith Grossman | essay collection | 2010 |
| Why War Is Never a Good Idea | Alice Walker | children's-picture-book | 2007 |
| Why War? | Sigmund Freud | coauthored-pamphlet | 1933 |
| Why We Die | Mick Herron | novel | 2006 |
| Why We Fight | TJ Klune | novel | 2019 |
| Why We Meditate: The Science and Practice of Clarity and Compassion | Daniel Goleman | book | 2022 |
| Why We Sleep: Unlocking the Power of Sleep and Dreams | Matthew Walker | nonfiction book | 2017 |
| Why We Want You to Be Rich: Two Men, One Message | Robert T. Kiyosaki | nonfiction | 2006 |
| Why We Want You to Be Rich: Two Men, One Message | Sharon L. Lechter | nonfiction | 2006 |
| Why We're in Vietnam | Stephen King | novella | 1999 |
| Why Willows Weep: Contemporary Tales | Tracy Chevalier | short-story-collection | 2011 |
| Why Work? | Dorothy L. Sayers | pamphlet | 1942 |
| Why Write? | Paul Auster | pamphlet | 1996 |
| Why Write? Collected Nonfiction 1960-2013 | Philip Roth | essay-collection | 2017 |