James Thurber 
The Secret Life of Walter Mitty 

Walter Mitty is an ordinary man living an ordinary life. But he has dreams – vivid, extraordinary day dreams – in which the life he leads is one of excitement and even adventure, in which he – a weary, put upon middle-aged man – is the hero of his own story.
A man can dream, can”t he?
The Secret Life of Walter Mitty is just one of the brilliant humorous and witty stories written by James Thurber and collected here.