A movie adapted from Bill O’Reilly’s best-selling book ‘Killing Lincoln’ pulled in the highest viewership ever for National Geographic Channel. An average of 3.4 million people tuned in to watch Sunday’s two-hour premiere of the film, which delves into the assassination of America’s sixteenth president.

Today on Happening Now, O’Reilly reacted to the news, saying that he was obviously very happy with both the adaption and they way it was received. His book ‘Killing Kennedy’ will also be adapted for film on National Geographic.

Jon Scott also pressed O’Reilly for details on his latest book venture. See what he revealed below.