How do you get level 30 enchants with 15 bookshelves?

How do you get level 30 enchants with 15 bookshelves? An enchantment table usually needs 15 bookshelves for level 30 enchantments. You need to surround your enchantment table with 15 bookshelves placed one above the other and must be one block away from your table. That will result in the maximum enchantment level.

An enchantment table usually needs 15 bookshelves for level 30 enchantments. You need to surround your enchantment table with 15 bookshelves placed one above the other and must be one block away from your table. That will result in the maximum enchantment level.
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