Short answers, pulled from the story.
The Caldecott Medal is awarded annually by the American Library Association to the illustrator of the most distinguished American picture book for children published the previous year. Ingri and Edgar Parin d'Aulaire won the third annual Caldecott Medal in 1940 for their picture-book life of Abraham Lincoln, published in 1939.
Ingri and Edgar Parin d'Aulaire arrived in the United States in 1929, settling into a cold-water walk-up flat in Brooklyn. Edgar had traveled ahead on a steerage-class voyage funded by an insurance settlement, and sent for Ingri once he had secured enough illustration commissions.
d'Aulaires' Book of Greek Myths is an elaborately illustrated compendium of Greek mythology published by Doubleday in 1962. It runs 192 pages across 46 chapters and later appeared as an unabridged audio edition narrated by Paul Newman, Sidney Poitier, Kathleen Turner, and Matthew Broderick.
Ingri and Edgar Parin d'Aulaire produced 27 illustrated books for children together. Their first collaboration, The Magic Rug, was published by Doubleday in 1931, and their final book, The Terrible Troll Bird, appeared in 1976.
The d'Aulaires won the Caldecott Medal in 1940 for Abraham Lincoln, the Boy's Club award in 1953 for Buffalo Bill, and the Catholic Library Association Regina Medal in 1970. In 1974 they were the United States nominee for the biennial Hans Christian Andersen Award for children's illustrators, and their 1972 book D'Aulaires' Trolls was a finalist for the National Book Award in children's literature.
New York Review Books began reissuing the d'Aulaires' books starting in 2005, reprinting Norse Gods and Giants as d'Aulaires' Book of Norse Myths with a foreword by Michael Chabon. The immediate popularity of that edition prompted further reissues of Trolls, The Terrible Troll Bird, and Animals Everywhere, with translations also appearing from Italian publisher Donzelli Editori and in Korean and Japanese editions.