I did get a set of “World Book” for free. I asked a clerk at a local Salvation Army type store how much they were and he said I could just have them.
World Book is really a pretty good encyclopedia.
I have a Nephew who is a Jag Colonel and possibly the smartest person I have ever known. He told me he plans on getting a set of used Britannica before long as he also likes the book format.
My sister got me started going to these used book sales. Four of us are going to the big Centenary Book Sale in a couple of weeks.
http://www.shreveporttimes.com/article/20100828/NEWS01/8280322/Centenary-College-s-giant-book-sale-to-return-for-24th-year
Centenary College’s giant book sale to return for 24th year