Our Lady of Fatima (Portugal, 1917)

Grade School:

The Children of Fatima by Mary Fabyan Windeatt
Our Lady Came to Fatima by Ruth Fox Hume

Teen/Adult:

Our Lady of Fatima by William Thomas Walsh

Movies:

Apparitions at Fatima
The Miracle of Our Lady of Fatima (1952)

On the Web:

EWTN's Fatima Page