:00, on heather cox richardson on the history of the republican party and live sunday at noon, joan bisupicfacts, the 100th anniversary of the panic mocon out -- of the panama canal. find our schedule on www.c-span.org and let us know about the programs you're watching by calling or e-mailing or you can send us a tweet. join the c-span conversation and like us on facebook and follow us on twitter. the c-span cities tour takes book tv and american history tv on the road traveling to u.s. cities to learn about their history and literary life. this weekend, we partnered with comcast for a visit to boulder, colorado. >> my book is called "the beast in the garden." it's a book about a large animal that in ancient times or in american history we would've called the beast, a mountain lion in what is really a garden and that is boulder, colorado. it is a beautiful, seemingly natural place but in many ways, it has been altered by human kind. when you get this wild animal coming into this artificial you actually can cause changes in the behavior of that animal. -- a mountains lion's favorite food is