by 
“The life of an artist … differs from the lives of other persons in that its events are becoming artistic sources even as they command his present attention. Instead of allowing each day, pushed back by the next, to lapse into imprecise memory, he shapes again the experiences, which have shaped him. He is at once the captive and the liberator.” Richard Ellmann in James Joyce (Recommended)
American literary critic Richard Ellmann (1918-1987) was also an excellent biographer and wrote about Joyce, Wilde and Yeats. As far as I know, all three books are still in publication.
Joyce photo is in the public domain.
Jamie Dedes' THE POET BY DAY Webzine 
Thank you!