Edward Ardizzone (1900–1979) – Tim All Alone, Tim and the Brave Sea Captain (self-illustrated).Philip Ardagh (born 1961) – Eddie Dickens series, Unlikely Exploits series.Victor Appleton ( Stratemeyer house pseudonym from 1910) – Tom Swift series.Applegate (born 1956) – Animorphs, Remnants, Everworld series, The One and Only Ivan Charlotte Anley (1796–1893) – Influence: A Moral Tale for Young People (1822).Sam Angus (born 1967) – Soldier Dog, The House on Hummingbird Island.Verily Anderson (1915–2010) – Brownie series.

Lena Anderson (born 1939) – Tea for Ten, Tick-Tock.Hans Christian Andersen (1805–1875) – ' The Snow Queen', ' The Little Mermaid', ' The Ugly Duckling', ' The Emperor's New Clothes', ' The Princess and the Pea', ' Thumbelina'.Julia Alvarez (born 1950) – Tia Lola series.Joseph Alexander Altsheler (1862–1919) – The Young Trailers series, The Civil War series.David Almond (born 1951) – Skellig, Heaven Eyes, Kit's Wilderness.Mabel Esther Allan (1915–1998) – Over the Sea to School, Ballet for Drina, The Ballet Family.Sue Alexander (1933–2008) – Nadia the Willful.Lloyd Alexander (1924–2007) – The Chronicles of Prydain series, Westmark trilogy.Kwame Alexander (born 1958) – The Crossover.Louisa May Alcott (1832–1888) – Little Women, The Brownie and the Princess.Vivien Alcock (1924–2003) – The Haunting of Cassie Palmer.Ahmad Akbarpour (born 1970) – If I Were a Pilot.Joan Aiken (1924–2004) – The Wolves of Willoughby Chase, Arabel and Mortimer series, A Necklace of Raindrops.Adler (born 1947) – Cam Jansen series, The Babe and I Adler (born 1932) – Magic of the Glits, Ghost Brother Jean Adamson (born 1928) – Topsy and Tim.Richard Adams (1920–2016) – Watership Down.Socorro Acioli (born 1975) – The Ghost Dancer.Chris van Abkoude (1880–1960) – Pietje Bell series, Little Crumb.Joan Abelove (born 1945) – Go and Come Back.Deborah Abela (born 1966) – Max Remy Superspy, Grimsdon.Tony Abbott (born 1952) – The Secrets of Droon, Danger Guys.Jacob Abbott (1803–1879) – Rollo series, Cousin Lucy's Conversations, Bruno.Verna Aardema (1911–2001) – Why Mosquitoes Buzz in People's Ears.

Unladylike by Ruth P. Watson