Fans of Jason Segel will not be surprised to learn the 37-year-old actor, screenwriter and producer has a soft spot for freaks and geeks. In fact, it was NBC’s 1999 series “Freaks and Geeks” that introduced Segel to the world, along with co-stars and Judd Apatow cohorts Seth Rogen and James Franco. That low-rated, critically acclaimed show eventually morphed into a cult-TV touchstone, but Segel has stayed busy throughout, writing and starring in big-screen comedies such as “Forgetting Sarah Marshall” and 2011’s Oscar-winning “Muppets” reboot, all while remaining firmly in the public eye through a nine-year, 208-episode run as Marshall Eriksen on the CBS sitcom “How I Met Your Mother.” Fans might be surprised, however, to learn that Segel is also a successful author, having co-written the “Nightmares!” children’s book series with New York Times bestselling author Kristen Miller. Their latest collaboration, “Otherworld,” was published Tuesday by Random House Children’s Books and brings Segel to the Denver Marriott South at Park Meadows at 7 p.m.