This guide details all vendor locations in Indiana Jones and The Great Circle, highlighting their importance in acquiring crucial mission items and skill-enhancing books. Vendors are key NPCs, selling books to unlock skills and reveal collectible locations on the map. Each major area (Vatican City, Gizeh, and Sukhothai) features at least one vendor offering essential mission gadgets.

Vatican City Vendors:
Two vendors are located near each other, easily accessible from the Belvedere Courtyard.
- Ernesto (Post Office): Essential for the "Stolen Cat Mummy" mission, he sells a camera initially, and later offers books detailing Vatican City mysteries, artifacts, books, and notes.

- Valeria (Pharmacy): A missable vendor (not tied to a quest) selling "Moxie" and "Shaping Up" books to boost stamina and health.

Gizeh Vendors:
Gizeh also boasts two vendors, situated further apart, requiring fast travel between them.
- Asmaa: Crucial for the "The Idol of Ra" mission, she provides a lighter for navigating dark areas and burning obstacles. She also sells books covering Gizeh notes, mysteries, artifacts, and books.

- Kafour (Worker's Area): Trades books for medicine bottles, offering "Moxie" and "Shaping Up" books to increase maximum stamina and health.

Sukhothai Vendors:
Sukhothai's two vendors are conveniently located a short boat ride from one another.
- Noo (Medical Hut): Found in Khaimuk Saksit Village, he requests medicine bottles in exchange for "Moxie" and "Shaping Up" books.

- Tongdang: The main Sukhothai vendor, selling a breathing device and books detailing Sukhothai mysteries, artifacts, cogwheels, notes, and books.

This comprehensive guide ensures you locate every vendor, maximizing your in-game progress and collectible acquisition in Indiana Jones and The Great Circle.