From Slave to Priest: A Biography of the Reverend Augustine Tolton (1854-1897): The First Black Priest of the United States by Caroline Hemesath, 237 pages
Although Father Tolton acquired a certain level of celebrity as the first American Catholic priest of primarily African descent* and was recognized as an eloquent speaker, he was less successful at the day to day work of running a parish. His meekness and humility, which were remarked upon by all who knew him, frustrated those, both at his time and later, who would have preferred a more assertive leader. Those same qualities of quiet holiness did not go officially unrecognized, however - his cause for canonization was officially opened in 2010.
Sister Hemesath's biography is a pious, popular work, full of invented dialogue both internal and external. Those looking for an inspiring story will be pleased, those who would prefer a "realistic" account will not. Those looking for more insight are referred to The History of Black Catholics in the United States, which covers Father Tolton's career and places it in a wider context.
* - Father Tolton is identified in the subtitle as "the first black priest of the United States". There were several mixed race priests in the US in the mid-nineteenth century, including a bishop and a president of Georgetown University, but they did not self-identify as "black". Likewise there were centuries worth of black priests outside the US, especially in Africa and Latin America - which is why the Roman seminary did not balk at Tolton's race.