45+ Enchantment Table Bookshelf Placement. The enchanting table actually produces the particles emitted from the bookshelves. Correctly placing the bookshelves around the enchanting table is key to receiving high level enchantments.
Updating the air blocks between the enchantment table and the bookshelves seems to be the only way to reset the table, breaking the table and placing it back still causes it to not see the bookshelves.
Book shelves around an enchantment table increase the maximum level of enchantment that can be obtained, up to level 30 at 15 bookshelves. To reach the highest levels of enchantment, 15 bookshelves need to surround your enchantment table. Use the platform as a guide, and keep in continue placing the bookshelves down so you have a perfect square. The game will see them as normal bookshelves.