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The Sparkle Crafting Manual (4) is a recipe book in Elden Ring. Recipe books are records of crafting techniques that players can use to learn how to craft a wide variety of items. Let's take a look at where to find the Sparkle Crafting Manual (4) and how to use it.

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Key items are used for quests, to unlock places, to learn spells or crafting recipes.

Image from the Artisan's Manual of Sparkle Points (4) in Elden Ring:

Descriptions from the Artisan's Manual of Sparkle Points (4):

Treaty of artisanal techniques abandoned by a craftsman of the stones of brilliance in the service of the Academy.
Contains information on what used to be called “false witchcraft.

Teaches how to craft the following:

English name of the item: «Glintstone Craftsman's Cookbook (4)»

Locations of the Brilliant Crafting Manual (4). Where to find the Brilliant Crafting Manual (4) in Elden Ring.

From Gate Town Academy, head northwest and look for a sunken church building with enemies on the roof. The chest is inside a tower that you can jump into.
On the map, it is located right next to the Academy Gate city icon, on the left/west side.