The Carolina-Duke rivalry is most intense, however, in basketball.[182] With a combined eleven national championships in men's basketball, both teams have been frequent contenders for the national championship for the past thirty years. The rivalry has been the focus of several books, including Will Blythe's To Hate Like This Is to Be Happy Forever and was the focus of the HBO documentary Battle for Tobacco Road: Duke vs Carolina.[183] Duke was Carolina's biggest rival from the 1930s until the early 1960s, when Duke's declining athletic program shifted Carolina's rival focus to North Carolina State.