I also read selected parts of The Good Book: A Humanist Bible
http://www.amazon.com/Good-Book-Humanist-Bible/dp/0802717373...
before I had to return it to the library yesterday. I especially like the section "Proverbs," which I read in full. I was able to find the section that quotes Confucius and Mencius extensively just before I returned the book. It's an interesting concept, but some parts of The Good Book: A Humanist Bible are extremely dull reading.
I am likely to read Quotology
http://www.amazon.com/Quotology-Stages-Willis-Goth-Regier/dp...
next, to learn more about how quotations are traced after being misattributed, a subject I own another book about.
I agree with the OP that A Connecticut Yankee in King Arthur's Court is well worth reading.