Printable Arduino documentation or user manual

If such a thing does not exist, it should. I very much enjoy the wiki documentation, but it would be nice to have an offline copy. My father asked me about this yesterday and I told him, “I’m sure they have some form of printable reference.” I cannot find it, so I think I have misspoke. He has been into electronics for more the 30 years and just can’t be comfortable without a printed manual. If such a thing doesn’t exist, I will write a bash script to scrape it from I would just like to know if I am wasting my time recreating someone else’s work.