I know what you mean, it took me multiple books and articles to pick up functional programming. 'Seven Languages in Seven Weeks' was a good book - as is the K&P

I know what you mean, it took me multiple books and articles to pick up functional programming. 'Seven Languages in Seven Weeks' was a good book - as is the K&P book you mention, but something complete that can teach an existing non-func programmer from the ground up, possibly using multiple languages, would be great