When searching for the Tool Worker's Guide in REI there are no results. The book does appear normally in the creative inventory tab and REI properly displays it's crafting recipe however it cannot be searched on it's own. Similarly searching for all The Forge items using the @ modifier doesn't show the book nor does searching @ Patchouli.

Mods Used

Architectury-4.4.56
Cloth Config-6.2.62-Fabric
Fabric API-0.57.0+1.18.2
Patchouli-1.18.2-71.1-Fabric
Roughly Enough Items-8.1.457
The Forge-1.2.0