The events and people are real. Biographies can be written in the picture book format, and the images often reflect the the time and setting of the person.
Some of the biographical subjects can be: explorers of earth or space, political leaders & social activists, civil rights leaders, artists & authors, and people or animals who have persevered.
(Through the Eyes of a Child: An Introduction to Children's Literature by Donna E. Norton)
Pride: the Story of Harvey Milk and the Rainbow Flag by 
Planting Stories: the Life of Librarian and Storyteller Pura Belpré by 
Whoosh!: Lonnie Johnson's Super-Soaking Stream of Inventions by 
