Oxford English Dictionary: 20 vol. print set & CD ROM

Proper words in their proper places--and a good many improper ones, too! If the OED's many obsolete definitions tend to be the most enjoyable--shuff is dialect for "shy," dolt was once upon a time a verb as well, meaning "to befool"--everyday idiosyncrasies still abound. But, for instance, occupies nine columns of text, and who would wish a single line away? There's also the sublime pleasure of trawling through the sea of relevant quotations. The OED's initial team of "voluntary readers" was asked to cite as many phrases as possible for both archaic and ordinary terms. None seems to have found this remotely arduous, and we now reap the ubiquitous ("present or appearing everywhere; omnipresent") rewards. This huge venture is a labor of lore, love, and good humor. One caveat: If you skip over the Historical Introduction, you'll miss learning about the Unregistered Words Committee, and overlook the wry warning, "If there is any truth in the old Greek maxim that a large book is a great evil, English dictionaries have been steadily growing worse ever since their inception...."