The Technic League of Numeria, a shadowy organization of arcanists who study the Silver Mount in Starfall, recorded an early survey of the Silver Mount's chambers and artifacts in the book A Thread of Silver. Despite great effort on the League's part, the original copy was stolen, and new copies have made their way out of the country.
The book is prized for its insights into Numerian technology (especially robots), supposedly surpassing even Pathfinder Chronicles Vol. 3 in detail. The League is known to hire assassins to kill anyone who possesses or reads the book for fear that they might reveal closely guarded secrets.
- Some sources, for instance Numeria, Land of Fallen Stars, refer to this book as A Thread in Silver.
- Amanda Hamon, Gareth Hanrahan, David Ross, and Jerome Virnich. (2013). Dungeoneer's Handbook, p. 15. Paizo Publishing, LLC. ISBN 978-1-60125-510-5
- Kyle Baird. (2014). The Technic Siege, p. 4 & 5. Paizo Inc.
- Jim Groves. (2014). The Technic League. Lords of Rust, p. 68. Paizo Inc. ISBN 978-1-60125-678-2