Rowena's Tokens aren't related to crafting. They're used to buy weapons.

Master Weaver III is a book of crafting recipes. You can buy it with Red Scrips from Scrip Exchange vendors in several locations. https://na.finalfantasyxiv.com/lodes...m/d6ea70dec02/

Red Scrips are obtained through the Collectable system unlocked from the quest Inscrutable Tastes in Ishgard: https://ffxiv.consolegameswiki.com/w...rutable_Tastes