I think that whole book series suffers from the motif of characters running in to famous landmarks and exclaiming ‘where is the clue!’
Then Langdon looks about, confused and then smiles and says ‘I know exactly what xyz is…’
Chapter end.
In the movies they smoothed out those very well in to enjoyable popcorn films.
…. Say what? I’ve read the first two Dune books. At what point do I need to stop before I reach this crazy storyline?!