I’m interested in a Portuguese Age of Discovery setting for lots of reasons. Also as someone who comes to Codex from other games and thinks primarily of Codex sourcebooks as system agnostic, anything you guys turn towards with the level of detail you have thus far shown will be great. For my money though, keep digging in that Central European Salt-Mine! There’s a million Viking books but this that you’re doing now is a missing niche. I would buy deep-dives on those cities.
I would buy anything that fell into that 1400-1650 period that moved somewhat south into the Balkans and Adriatic. How about Ragusa?
If you have thoughts about Middle Eastern things, do let me know as I am fluent in Arabic.