Ah... OK, totally my bad. The door to what I guess will turn out to be the library is opened by a key which I *had* picked up , but I must have deseletced the character carrying it when trying all the doors. So the problem was purely down to me not having all characters selected when clicking on all the doors. Totally my fault, and really sorry to have bothered you!

Kehallos, sorry you got stuck! There's a progression to this single map that requires looting anything that the dialogue hints lead you to. The characters will make observations or talk to each other about something they see, then it's best to grab it or investigate.

Here's a spoiler, click to reveal: The southeast door is locked with the silver key, which you get from the desk in the north, middle room, the one with all the armor. That north room with the armor is unlocked with the engraved bone dice that you find on the study desk on the east side of the library. There is a clickable hint on the wall next to that door.

Any hints how to get the locked doors open? (Or even a walkthrough?) I've stood in front of the banners, and all around the covered statue (since there were hints about them being in odd places, I thought that might suggest pressure pads?), searched all the interactable containers (only found one key, near the armour stand which just opened the door back to the entrance), lit all the lightable torches (in case their locations triggered something)... and I still can't get beyond the 4th room. No idea how to proceed. Any hints?

Yep indeed the map was cool and full of fights ! In the Vel's Style 100%

Difficulty: hard
Feature: lots of content in a small map
Loot: moderately rewarding
Focus: tactical combat
Maps: 1

Difficulty of the combat in this map is hard. Very challenging (but fun!) for level 1. Enter at level 3 for an easier time.

The intent of the map was to show how much interesting and challenging combat you can get on merely a small size map. Playtime for experienced players is 1-2 hours.