Editors.... What book do I need?

I have the third edition hardcover A DICTIONARY OF LITERARY TERMS by Cuddon because I'm old that has helped me out through many years of study and publishing work. I see there is good website that covers the same material:: a href="http://web.cn.edu/kwheeler/lit_terms.html" rel="nofollow"http://web.cn.edu/kwheeler/lit_terms.htm…/a