Reddit co-founder Alex Ohanian will speak in the Kauffman Center Great Hall at 8 p.m. Oct. 23. He will discuss his new book, “Without Their Permission,” in which he outlines his philosophy and ideas about using the powers of the Internet for good.

The event is free and open to faculty, staff and students. Reservations, which can be made at http://go.unl.edu/q63w, are required.