Why would Martin Luther King Jr. say that this book is "Bible of the Civil Rights Movement?"

The term Jim Crow refers to a large body of law and social custom which served to establish and maintain segregation of the races in the South following the end of Reconstruction and moving into the mid-twentieth century. In his book, The Strange Career of Jim Crow, C. Vann Woodward provides a complete historical accounting and significant analysis of its advent, its impact on race relations within and outside of the South, and its legal demise by 1965.