See below for links to online primary sources that tell the Illinois Suffrage story.
Chronology of the Women’s Rights Movement in Illinois by Catharine Waugh McCulloch. Covers the movement from 1855-1913.
Sidelights on Illinois Suffrage History by Grace Wilbur Trout.
Biography of Mary Livermore – an early and important figure in the Illinois movement.
Biography of Ruth Hanna McCormick – an important figure in the 20th century suffrage movement.
The six volumes of The History of Woman Suffrage includes a lot of information about Illinois.