After Jackson's death in 2009, Levine was interviewed by numerous media outlets about Jackson's conditions through those years. Levine described Jackson's life as a self-destructive journey and was quoted as saying, "His talent was unquestionable, but so too was his discomfort with the norms of the world. A human simply can not withstand this level of prolonged stress." Levine has represented comedians including George Carlin, Sam Kinison and Rodney Dangerfield. In 2010, he organized a birthday party in honor of then deceased Carlin. The event was attended by celebrities Tom Arnold, Paul Mooney, Paul Rodriguez, Tom Green, Judy Tenuta, Jay Phillips and Shawn Wayans, each of whom held a sign representing Carlin's seven dirty words. Levine also gave commentary on the Laugh Factory incident involving Michael Richards' use of racial slurs during a stand up act in 2006. Levine is the author of 19 books and numerous op ed pieces that have appeared in publications including The Wall Street Journal, Psychology Today, Reader's Digest, Los Angeles Times and the USA Today. His book "Guerrilla P.R." became the best-selling P.R. book of all-time. He has spoken at Oxford, UCLA, and Harvard University. Levine is the creator of a national online newsletter "LBN E-lert" (sometimes referred to as "Levine Breaking News"). The newsletter started with an email list of approximately 500 people with whom Levine had previously worked. It was reported that the newsletter has more than 474,000 subscribers from all 50 states in the U.S. as well as 26 other countries. Levine's commentary has been sought for numerous incidents involving celebrities, including the molestation controversy involving Josh Duggar that gained national attention in 2015, speaking on Justice with Judge Jeanine in June 2015.