Themed Issues are collections of puzzles, sorted by type. Scroll down the game's home screen to see them.

Puzzles within a Themed Issue can be unlocked and played in any order. Keys are used to unlock these puzzles. Methods to obtain keys are listed in the in-game store.

Complete an issue to unlock the next one of the same type.

Tap the cover of an Issue to view its contents, then select a page to open it.

While viewing a page within a Themed Issue, you can return to the contents by tapping the icon in the top left corner of the screen.

New Themed Issues are added to the library regularly.