You will need 15 bookshelves to reach level 30 enchantments. Place fifteen bookshelves around the enchanting table. Place all the bookshelves close to each other. Surround your enchanting table with one block of high bookshelves leaving space in the perimeter. You can also use any planks for the same purpose.

To make a level 30 Enchantment Table in Minecraft, place your Enchantment Table in the center of 15 bookshelves so that there's an empty space between the table and each bookshelf. The easiest way to achieve this is to arrange your bookshelves in a 5X5 square, leaving an opening for the entrance.

Level 30 is the highest level enchant you can get in the game. You need to surround your enchantment table with at least 15 bookshelves. Each bookshelf adds 2 levels so 15 make 30. Show more Level 30 is the highest level enchant you can get in the game.