Robert Langdon

So I'm reading "The Lost Symbol" by Dan Brown for the third of fourth time, and I don't really know why. As a preface, Dan Brown is a very talented writer, and I've read all his classic mystery thrillers (after I ran out of Micheal Crichton books- RIP), but the more I re-read the more uncomfortable my sub-conscience  becomes with the laissez faire attitude towards the main character's personality. For example, I came across a passage like the one I have replicated below.

Katherine: All we have for clues is this meaningless jumble of letters and an weird old painting- how can this be a map! This makes no sense! and if we don't figure it out my BROTHER IS GOING TO DIE!

Langdon: Actauly we have all of the information we need.

Katherine: What? You know how to decode this!? You see the map?

Langdon: Do you not see it? Its quite obvious- why my Harvard students would have no trouble figuring this out.

Katherine: Uh.. I don't see anything- is it the hour glass?

Langdon: I say Harvard students because that's where I teach.

Katherine: ?

Langdon: Not the hours glass. I teach at Harvard. Go ahead- guess again!

Katherine: I- wha-? the compass? The, uh, telescope?

Langdon: Nope!

Katherine: Are you taking this seriously? PETER WILL DIE!

Langdon: Oh yes! Dear Peter! To cut to the chase- the clue is......

Katherine: ... is what?

Langdon: the magic square!

Katherine: What is wrong with you?

Langdon (sounding hurt): I was just building up suspense.

Katherine (In disbelief): right... A magic square? You mean that grid of numbers in the corner?

Landgon: Precisely!

Katherine: Why is it magic?

Landgon: Try adding up the numbers in each row.

Katherine (Incredulous): uh... 9+13+... Wait- stop messing around- just decode it!

Langdon (unfazed): The rows all add up to 34- isn't that neat?

Katherine: ...Is that important?

Langdon: And the columns- they add up to 34 too.

Katherine: Is the number 34 important?

Langdon: So do the diagonals

Katherine: ... gimme that pencil- i'll figure this out

Langdon: And the corners

Katherine: it says, "One True God"

Langdon: And the center. Also adds to 34.

Katherine: I'm sorry- you escaped CIA custody how?