Lithuania’s Larpwriter Summer School has published a book of larps!
https://drive.google.com/file/d/14QcMCPjERrNJudUv5eUGWUCzp2wsZVdL/view
There’s also a G-Drive folder full of game materials for them:
https://drive.google.com/drive/folders/1KsflNr14IUfigXMDubiQNDZ5JiOy00Fi
There’s ~100 pages of articles, and ~400 pages of larps. I expect the latter to be mostly workshoppy, but there might be a few interesting ones in there.