Ah how many times have I explained this to someone...
Originally, that episode, rather than collecting Red Coins, you were supposed to get the book. For some reason, they changed it to Red Coins and made the door not open, but were too lazy to remove the book since they figured no one would ever see the book by using a through the wall camera angle glitch. Well they were wrong. If you were to use a HEX Editor on an emulator, I'm sure it'd be possible to obtain the book, although Gamecube ROMs are very illegal and I think non-existant at the time being. If you were to obtain one though, I'm sure you'd probably receive another Shine Sprite since they left the book in, which opens the door to 121 Shine Sprites. Although you'd have 121 Shines, nothing special would happen since they never planned for 121 Shines to be accessible.
Does that help any?
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If it is black and white and smells awful, I assure you it''s adorable.