The Gospel of Barnabas is mentioned as a document brought up in a conversation, but it is identified as a 15th-century work that paraphrases Dante's Inferno. It is discussed in the context of whether it serves as evidence against the crucifixion of Jesus.
"The speaker mentions the 'Gospel of Barnabas' in the context of a historical document, so a listener may want to buy this to read about its historical significance."