Library (Super Mario Galaxy)

The Library is an area of the Comet Observatory in Super Mario Galaxy. While not technically a Dome, it can be entered. As the player collects Power Stars, chapters of Rosalina's Storybook open up that can be read in the Library. The first time a new chapter is unlocked, Rosalina will be in the Library to read to Mario/Luigi and the Lumas. Afterwards, Mario/Luigi can revisit the Library to reread the story at his leisure.

The Library makes a quick appearance in the end of Super Mario Galaxy 2 where Rosalina is reading to the Lumas about the game itself and the Green Power Stars.