The award, named after the celebrated Swedish children's book author Astrid Lindgren, is the world's largest prize offered for childrens' literature. It carries a cash prize of SEK 5 million kronor.
In making the announcement, the jury said that: "Isol creates picturebooks from the eye level of the child. Her pictures vibrate with energy and explosive emotions. With a restrained palette and ever-innovative pictorial solutions, she shifts ingrained perspectives and pushes the boundaries of the picturebook medium. Taking children's clear view of the world as her starting point, she addresses their questions with forceful artistic expression and offers open answers. With liberating humour and levity, she also deals with the darker aspects of existence."
The Astrid Lindgren Memorial Award will be presented at a ceremony at the Stockholm Concert Hall (Konserthuset) on 27 May 2013.