Boy Reading an Adventure Story (1923) by Norman Rockwell (1894-1978). Rockwell was a popular American author, painter and illustrator.
I wonder what the book is that the boy is so absorded by? It seems to be illustrated. Having been in the book trade, if I had to guessimate, I’d say it was something by writer and illustrator, Howard Pyle – “The Story of King Arthur and His Knights” (or one of it’s 3 sequels), 1903-1910.
The dog is dreaming of lunch.