Siverfale
An attempt to group local lore/info for those who like to read:
Countries: Shengkai, Airisufir, Regnleif, Mirai, Kuwayama
Queen of Regnleif: Philia Idolatrais
Valkyries: Chronicles of the Valkyries, Gisela Albireo, Rika Serdolik, Mifune Sachiko, Xiang Chanchan, Kayano Sayaka, Felicia Lungwort, Akate Ilminif, Lymma Madrigal, Lobelia, Liutgarda der Grosse, Vita
Newspapers: Chronicles of Eugen, issue of 28.01.779, Chronicles of Eugen, issue of 06.03.779, White Wolf, issue of 15.04.779, Chronicles of Eugen, issue of 15.05.779
Miscellaneous: Currencies, Demons 
(volume 1, volume 2), Guide to Baldur, Interview with Her Majesty Sophia der Grosse, 774, Guide to Elheim, Gladiators
What to read for bonuses:
Collection of books in the church of Baldur
Books from the bookstore of Baldur
Guide to Baldur - from Kalentia
Interview with Her Majesty Sophia der Grosse, Guide to Elheim, Demonology volume 2 - from Alessia
774 - from Eir
Gladiators - from Gulveig
Where do we end up when we save the world?