I have been to a professor Wilson talk a few months back , was both fascinating and insightful . He did answer a lot of my questions in the 'talk ' section of the event , and did answer more in the q and a .£25 is a bit steep however there's an opportunity to ask him questions at the end. Not sure how in depth the Q&A would be.
Professor David Wilson: My Life with Murderers at University of Strathclyde, Glasgow City Centre | What's On Glasgow
I might add his original hometown is where I live now so he always does a talk every so often in local library tickets only £5 .