Karen Blixen adopted the pseudonym of Isak Dinesen for all of her published work when she returned from Africa in 1931 to live in Denmark permanently. With the publication and acclaim of Seven Gothic Tales, the true identity of the author soon emerged as Blixen, who wrote under her own well-known maiden name of Dinesen.

In her autobiography Out of Africa, Blixen applied this idea to herself. Although Blixen sometimes wrote under a pseudonym, Isak Dinesen being her most frequent choice, she wrote Out of Africa as Karen Blixen. The book was her memory of the seventeen years she lived in Africa as coffee plantation owner Baroness Karen Blixen-Finecke.

Pseudonym used by the Danish author Karen Blixen. Baroness Karen von Blixen-Finecke (Danish: [kʰɑːɑn ˈb̥leɡ̊sn̩]; 17 April 1885 – 7 September 1962), born Karen Christentze Dinesen, was a Danish author, also known by the pen name Isak Dinesen, who wrote works in Danish, French and English.

Baronesse Karen von Blixen-Finecke (døbt Karen Christentze Dinesen; født 17. april 1885 på Rungstedlund i Rungsted, død 7. september 1962 samme sted) var en dansk digter, forfatter og historiefortæller, som også skrev under pseudonymerne Isak Dinesen, Osceola og Pierre Andrézel.

Pseudonym of: Karen Christence Dinesen, Baroness Blixen-Finecke