Verbal Behavior as a name-your-price PDF book (starting at $0.99) has been a resounding success! Many of you have added a modest donation on top of the minimum price, thank you! As the direct result of your generosity the B. F. Skinner Foundation is able to continue to offer all its PDF books as name-your-price products: Contingencies of Reinforcement, Cumulative Record, Principles of Psychology, Science and Human Behavior, Verbal Behavior, and the recently converted Schedules of Reinforcement. Before the end of 2015 we will publish in e-book formats Behavior of Organisms and The Technology of Teaching. All this is possible because of your support, so please come visit our bookstore often, add more books to your Skinnerian collection, and donate to the B. F. Skinner Foundation while you are at it!