I'm a BL member and saw this in their event programme. I think it's unlikely many members will have heard of either, or be tempted by the description. I have seen some proper top drawer speakers at their events (science communicator Maggie Aderin-Pocock, Tolkien illustrator Alan Lee, chess player Gary Kasparov, DJ Mark Radcliffe, best selling writers like Anna Pavord, Jeannette Winterson & Val McDermid etc). I think the biggest queue for book signing afterwards was for Stephen Morris (Joy Division drummer). I don't think Shon and Torrey are in quite the same league.