On a recent Friday night, Tyler Knott Gregson, a blond, tattooed poet from Montana, took the stage at a Manhattan bookstore and beamed at the crowd that had come to celebrate his new haiku collection.
“This is rad. I appreciate it,” he said, taking in the roughly 150 people who had crowded into Barnes & Noble. The response from the mostly young, mostly female audience amounted to a collective swoon.
Seven years ago, Mr. Gregson, 34, was scraping by as a freelance copywriter, churning out descriptions of exercise equipment, hair products and medical imaging devices. Now, thanks to his 560,000 Instagram and Tumblr followers, he has become the literary equivalent of a unicorn: a best-selling celebrity poet.