Halligan's first book,
Inbound Marketing, was co-authored with HubSpot co-founder Dharmesh Shah. They coined the term “inbound marketing” and built a movement around the concept which included organizing the INBOUND conference. The thesis of the book is that because people block marketing that interrupts them, such as advertisements and spam, companies need to instead provide information that is useful to prospects, who will then self-identify. Reviewing the book, Meryl Evans said that it contains "elementary stuff..." but it "does a good job for those who don’t have a clue about how to use social media for business". As of July 2011, the book was in its seventh printing, had sold 40,000 copies, and had been translated into nine languages. , Halligan (right) on the
Marketing Lessons... book tour. The background photo montage includes Jerry Garcia, co-founder of The Grateful Dead.His second book,
Marketing Lessons from the Grateful Dead, was co-authored with David Meerman Scott. It uses the marketing activities of the rock band
The Grateful Dead as an example of this. Scott Kirsner, reviewing this book in
The Boston Globe, mentions that the authors say that they were inspired, in part, by an article in
The Atlantic by
Joshua Green. In 2017, Halligan purchased the
"Wolf" guitar once owned by Garcia for $1.9M at a charity auction. An anonymous donor made an additional donation of $1.6M and so the total benefit the
Southern Poverty Law Center was $3.5M. He is also co-authoring a
Harvard Business Review case study on the group. Halligan speaks on marketing and business topics, including at
TEDx. Halligan has been named to
Glassdoor’s annual top CEO list several times, listed by Comparably as one of the Top 5 Best CEOs of a Large Company as well as Top 5 Best CEOs for Women and for Diversity. He is also an occasional lecturer at Sloan on the science of selling and marketing. MIT Sloan honored Halligan in 2023 with the Monosson Prize. ==Daniel Lyons incidents==