Book Book.StS2.RefLib by: Book .NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher. 892 total downloads last updated 5/23/2026 Latest version: 0.106.1-beta (prerelease) StS2 Mod Slay The Spire 2 reference assemblies. Compile mods without referencing the game.