Her subsequent contributions to this genre include The Brothers Lionheart ( 1973 ) and Ronia the Robber 's Daughter ( 1981 ) .
Mio , My Son is Lindgren 's first high fantasy novel .
Lindgren 's subsequent contributions to this genre include The Brothers Lionheart ( 1973 ) and Ronia the Robber 's Daughter ( 1981 ) .
Mio , My Son is Lindgren 's first high fantasy novel .