Persephones for Book Groups?

Hi all, do you have any recommendations for Persephones that would be good for book group discussions? My group have previously read The Shuttle and in September we'll discuss Cheerful Weather for the Wedding. Any others to recommend?

Oh thank you! I have read both of those and agree that they would be excellent for discussion. And as I live in Arizona I think The Expendable Man would be of great interest to my group.