Any recommendations on a book about William O. Stoddard?

[LincolnMan]

The man seems amazing: author, inventor, and friend of Lincoln. He worked for Lincoln-and wrote out the first Emancipation Proclamation in 1862. Lived a long life. Is there a standard work on him- or is one of us going to have to write it? Rob, after Sandburg-Stoddard is your next subject!