Your friend saw this resource on bethinking.org and thought you should see it:
The New Testament Documents - Changed Beyond Recognition?
Bart Ehrman and Pete Williams debate the trustworthiness of the New Testament documents on Justin Brierley's 'Unbelievable?' radio programme.
See the full resource online by visiting bethinking.org:
https://www.bethinking.org/is-the-bible-reliable/nt-documents-bart-ehrman-pete-williams-debate
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bethinking.org is a collection of resources which aims to make sense of the big questions of life about God, Jesus and Christianity.