Isa Silveira Leal, (20 February 1910 – 5 April 1988) also known as Isa Leal, was a Brazilian writer, poet, journalist and novelist (for radio and television). She won the Jabuti Award on three occasions^[1] and the best poetry book prize from the São Paulo Association of Art Critics.^[2]

Isa Leal began her career as a book translator and translated texts by William Shakespeare,^[3] Pearl S. Buck^{[citation needed][4]} and André Gide.^[5] She worked as a journalist for over 20 years at Folha de São Paulo.

In 1948, Leal started working at Difusora Radio Station, as a producer. She wrote her first novel in 1956, with the title "A rainha do rádio".^[6]

She won the Jabuti Award on three occasions:^[1] In 1959 with "Glorinha",^[7] in 1962 with "O único amor de Ana Maria"^[8] and in 1969 with "O menino de Palmares".^[9] The book "O pescador vai ao mar" won the best poetry book prize in 1987 from the São Paulo Association of Art Critics.^[2]

Isa Leal was born in Santos, São Paulo on 20 February 1910. She was the only daughter of the couple of writers Valdomiro Silveira and Maria Isabel Silveira.^[10]

Leal was married to the well-known physician and writer Alberto Leal.^[11]

Selected works include:

• A rainha do rádio (The Queen of the radio) – 1956
• Glorinha – 1958
• O menino de Palmares (The boy from Palmares) – 1971
• O único amor de Ana Maria (The only love of Ana Maria) – 1961
• Glorinha e a quermesse (Glorinha and the kirmess) – 1972
• Glorinha e o Mar (Glorinha and the ocean) – 1973
• Elas liam romances policiais (They read detective novels) – 1973
• Sem cachimbo nem boné (Without a pipe or cap) – 1977
• Mistério na morada do sol (Mystery at the Sun's Abode) – 1982
• O Barco e a Estrela (The boat and the star) – 1983