Sousou no Frieren - episode 4 - 28 Sep, 2023

Frieren and Fern visit Eisena. While rekindling their old friendship, Eisen asks them to help him find "the writings by the Great Mage Flamme". The three of them go deep into the forest where the book that Heiter discovered before his death lies. Although most of the diaries labeled as Flamme's Notes seem to be fake, the real one may or may not be found in that place. (Source: Official site)