has released digital versions of some fanbooks. You can check the Sphere Official Website
Includes character sheets, setting details for the rural town of Okukozome, and background art. yosuga no sora official character book download
For collectors, this is the definitive resource. It captures the bittersweet essence of the series perfectly. If you are looking for specific technical details or high-resolution art for wallpapers, the physical book remains the gold standard over compressed digital scans. has released digital versions of some fanbooks
Yosuga no Sora Official Character Book - - Comics in Japanese and background art. For collectors