June's reference book of the month is Tom Dalzell's edition of The Routledge Dictionary of Modern American Slang and Unconventional EnglishThe following description is from amazon.com: 

The Routledge Dictionary of Modern American Slang and Unconventional English offers the ultimate record of modern American Slang.The 25,000 entries are accompanied by citations that authenticate the words as well as offer lively examples of usage from popular literature, newspapers, magazines, movies, television shows, musical lyrics, and Internet user groups. Etymology, cultural context, country of origin and the date the word was first used are also provided.This informative, entertaining and sometimes shocking dictionary is an unbeatable resource for all language aficionados out there.

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Recommended for anyone writing papers on the morphology of language and  English majors.