Beahm, George, The Stephen King Story, Andrews and McMeel, 1991.

The Stephen King Story is a biography of the bestselling writer. While it was published in 1991, predating many of King's novels and long before he wrote Song of Susannah, the book provides a detailed portrayal of King's childhood, his literary influences, his struggle to become a writer, and his rise to fame.

Bloom, Harold, editor, Bloom's BioCritiques: Stephen King, Chelsea House Publishers, 2002.

A collection of essays elucidating important themes in the novels of Stephen King, many of which are relevant to Song of Susannah, though none discuss it or the "Dark Tower" series specifically. Included in the volume are an introduction by Harold Bloom, who dismisses King's work as unreadable, and a biographical essay on King.

Furth, Robin, Stephen King's The Dark Tower: A Concordance, 2 Volumes, Scribner, 2003 and 2005.

Furth's concordance for the "Dark Tower"series includes an...