I have to concur with Plum. It happened for me in the same way. Da Vinci first, then Angels.
The trouble is now that I have been to Rome I want to re-read Angels, well, at least parts of it, to better visualize the settings.
"I am open, and I am willing,
For to be hopeless would seem so strange.
It dishonors those who go before us,
So lift me up to the light of change."
Holly Near