SPOILERS AHEAD
I just watched the show, and caught a couple of Easter Eggs in tonight’s show, Catch-22.
The book that Desmond found was Ardil-22, the Portuguese translation of Catch-22.
The picture on the monk’s desk showed the lady from the shop where Desmond tried to by the ring – the lady that knew all about Desmond in his previous flashback episode.
All add more as I find them.