Penn Jillette is a magician, comedian, illusionist, juggler, and writer known for his work with fellow illusionist Teller in the team Penn & Teller. He is an advocate of atheism, libertarian philosophy, free-market economics, and scientific skepticism. His books include Cruel Tricks for Dear Friends, Penn and Teller's How to Play In Traffic, How to Cheat Your Friends at Poker: The Wisdom of Dickie Richard, God, No!: Signs You May Already Be an Atheist and Other Magical Tales, and Presto!: How I Made Over 100 Pounds Disappear and Other Magical Tales.