A free mod for Stardew Valley, by donko526.

Gus’ Recipe Book is a mod that acts as a content pack. It moves recipes sold by Gus to a recipe book located on the left side of the bar. It is made in such a way that each individual recipe should be able to be acquired only when the player is ready to cook. This content pack is made in such a way that it will not cause any errors or bugs in the game. It is also compatible with all versions of the game.

This is a mod pack, which means that it is a mod version of the game. In other words, it is an application that is installed on the smartphone or tablet.