I read the Listeners when I was in college in the 80s. The edition I read had a forward written by Carl Sagan. The book was truly visionary and insightful. Some years later Contact came out and I was amazed at how Sagan had comletely stolen Mr. Gunn's plot. What really purturbed me was that nowhere in the credits did Mr. Sagan even mention James Gunn. It just seemed to me that Sagan just stood by and took credit for the entire story. To Mr. Gunn: The Listeners is a much better story than Contact! Thanks.