Arndís studied at Menntaskólinn í Reykjavík, and took a BA in literature at the University of Iceland, and an MA in creative writing at Goldsmiths, University of London.
[1] She took a further MA in creative writing at the University of Iceland in 2018, with a thesis entitled Vetur fram á vor: Skáldsaga fyrir börn ("From Winter to Spring: A Novel for Children").
[2][3] She is the head of the ancient and popular culture departments of the Bókasafn Kópavogs (Kópavogur Public Library).
[5] In 2019, her novel Nærbuxnanjósnararnir was nominated for the Icelandic Literary Prize in the children's and young people's section,[6] and in 2020 her Blokkin á heimsenda, co-written with Hulda Sigrún Bjarnadóttir, won the Barnabókaverðlaun Guðrúnar Helgadóttur (Guðrún Helgadóttir Children's Book Award).
[8] In addition to short stories for children and adults, Arndís has published: