if you'd like to see a fuller program with ms. alger, you can go to our web site, booktv.org. >> c-span launched booktv 20 the years ago on c-span2 the, and since then we've covered thousands of authors and book festivals spanning more than 54,000 hours. in 2008 we interviewed former professional tennis player and gender equality advocate billie jean king. >> for me, it changed my life. 35 years ago when i played against bobby riggs, i would think every single day of my life somebody brings it up where they were, what they remember, how it affected them. some people come up to me and they'll be crying and tell me their story. particularly fathers will come up to me and daughters, and they'll say -- they'll come up with tears in their eyes, and they'll say i just have to tell you something. i was 10 years old, for instance, when i watched your match, and now i have a daughter. and i raised her differently because i watched that match that night. >> you can watch this and all other booktv programs from the past 20 years at booktv.org. typ