Changing book apperance

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As David, I would like to be able to choose the font, text size, and line spacing when reading a book so I can customize my reading experience.

Tasks

• Provide a button on the screen when a user is reading a book that allows them to change font, text size, and line spacing to amounts they can enter

Acceptance criteria

• Users should be able to change the font, text size, and line spacing of the book they're reading