A harlequin novel called The Little Death. I've exhausted all of the historical resources here and non-fiction is hard to come by.

[With all the time to kill in the middle of the night he's taken to reading and the only thing available to him was harlequin novels with not much in the way of plot but enough to follow and keep him busy.

Even that can't always keep his attention, hence the pie. Castiel places a large palm down on Dean's lower leg when he takes a seat, mostly to make sure that he doesn't sit on top of him under the covers.]