Dear Doctor, Arknights 1st Anniversary Illustration Collection will be available on Yostar Online Store on Jan. 8, 21:00 (UTC-7)!
Revealed via tweet on the @Arknights_EN Twitter account, the Arknights 1st Anniversary Illustration Collection includes an art book and various small merchandise items.
The Arknights 1st Anniversary Illustration Collection can be preordered from this site while supplies last.
The art book cover also has a custom illustration of Operators Amiya, Ch’en, the player Doctor, and Kael’tsit.