"Only a Poor Old Man" by Carl Barks - original 1952 cover. Not the first Uncle Scrooge story, but the first Scrooge 'solo-book' from 1952. It defines the character for the solo-adventures that would follow. According to Fantagraphics the 30-volume Barks Library will most likely contain 4 volumes of Scrooge solo-stories. One volume published so far. Three Donald Duck volumes have been published, these also contain some Scrooge stories.
“To have an empty brain is a complete delight.” Maira Kalman on Art and the Power of Not Thinking | Brain Pickings