SK Book

SK Book (Pearl Bay Magazine on CN) is a set of monthly missions that feature a rotating roster of 6 characters. Players are rewarded with stamps for each mission they clear, with rewards for each stamp milestone. The rewards also include SK Tickets, which can be used to vote for next month's featured characters.

The SK Book also features 4 ship traits every month, and the player can assign up to 4 ships to each trait for a stat bonus.

Voting for next month's ships requires SK Tickets Featured ships have stamp missions that unlock rewards

Featured Traits
The fourth slot is unlocked by completing 2 monthly missions

Monthly Missions
Progress towards monthly missions only count for the featured ships