Some side quests are more enjoyable than others, while some prove more confusing or frustrating. Completing "In Vino Veritas" in *Kingdom Come: Deliverance 2* involves numerous small steps and even a side quest within a side quest. Let's break it down.

Speak with Casper and Havel

Begin "In Vino Veritas" by speaking with Casper Rudolf at his drink cart on the east side of Kuttenberg City (easily found by proceeding straight from the east gate). He seeks the secret to the monks' exceptional wine. Exhaust all dialogue options to learn about Havel and the book he entrusted to Adleta. This sets the stage for your approach to Havel.

To obtain the book from Adleta, visit her garden in the southeast corner of Kuttenberg's inner wall during the morning or afternoon. Gather five marigolds beforehand. Either find her before her brother, Hugo, arrives, or speak with Hugo to get permission to talk to her. Maintain a kind demeanor when asking for the book for Casper. You can attempt a skill check to obtain it directly, or gift her the marigolds. Once acquired, read the book from your inventory. Note: Obtaining the book is optional.

Alternatively, proceed directly to Havel's inn in Kuttenberg. Enhance your drinking skills and wear an outfit boosting your Charisma to at least 18. In your conversation with Havel, select the following options: Germany, "Let's do it," "That's a very fine gift," Steinberger, and finally, "It's missing ginger." This impresses Havel, revealing the monastery's secret ingredient. Report this information back to Casper.

Find the Monastery’s Secret Ingredient

Travel to the vineyard north of Kuttenberg. Initiate the "Under the Straw Hat" side quest by speaking to the recruiter. While not mandatory for "In Vino Veritas," starting it allows unrestricted vineyard access. Locate Jerome on a bench near the main building.

Enter the main building, turn left, and access the storeroom. Use your lockpicking skills to open chests and obtain the required Sulphur Wicks for Casper. For extra Groschen, gather five seedlings from the garden behind the main building before departing.

Completing "Under the Straw Hat" involves tasks like removing plants and moving sacks, rewarding you with Groschen upon completion. Regardless, return to Casper, providing him with the wicks and seedlings (if collected).

This concludes "In Vino Veritas," allowing you to progress to other quests in Kingdom Come: Deliverance 2, or perhaps pursue badge and dice collecting.