"[2] His weekly column, "Lederer on Language," appears in the San Diego Union-Tribune and his articles are in newspapers and magazines throughout the United States including the Mensa Bulletin.

[citation needed] Known as a "verbivore," a word he coined in the late 1980s, Lederer's interests include uncovering word and phrase origins, pointing out common grammatical errors and fallacies, and exploring palindromes, anagrams, and other forms of recreational wordplay.

[citation needed] His books about various subjects other than language include Presidential Trivia (2007), A Treasury for Cat Lovers (2009) and A Treasury for Dog Lovers (2009), The Gift of Age (2011), A Tribute to Teachers (2011), and American Trivia with Caroline McCullagh (2012).

He continues broadcasting through regular guest appearances on several major market public and Clear-Channel commercial radio stations.

[citation needed] Lederer makes more than a hundred appearances each year, many of them benefit performances in San Diego.