The Lynn Artbook. If you liked the game, consider buying this DLC
This DLC is a Digital Art Book of Lynn.

*This book consists of 120 pages.

Art Book is provided as a PDF file and written in English and Korean.

Featuring:

Concept Art - see how the many details things such as stories, characters, puzzles evolved during game's development.

Artist's Notes - You can own and enjoy their work described by many artists of Lynn.
Developer's Commentary - Developers wrote comments that give a glimpse of the story behind Lynn
Unpublished illustration - Art illustrations that are not released in the main game.

Access:

After download, you'll find the Artbook in your game's directory folder,

accessible through:
(Installation Path)\Lynn_ArtBook\Artbook_Lynn.pdf

ex) E:\Program Files (x86)\SteamLibrary\steamapps\common\Lynn\Lynn_ArtBook\The Art Of Lynn_Eng.pdf