I've just approached modal logic reading "An Introduction to Non-Classical Logic" of Graham Priest.
I am looking for some books that treat this argument in a more extensive way than the book I am reading. I am especially interested in the philosophical side of modal logic.
Can you suggest me some books?
Here are a few recommendations for you, all with an emphasis on the philosophical aspects of modal logic:
"Modal Logic for Philosophers" (Garson, 2006).
"Modal Logics and Philosophy" (Girle, 2000).
"Handbook of Philosophical Logic, Volume 14" (Gabbay and Geunthener eds, 2007).
"Modal Logic: An Introduction to Its Syntax and Semantics" (Cocchiarella and Freund, 2008)
I hope these help.