Lua error in package.lua at line 80: module 'Dev:Arguments' not found.Lua error in package.lua at line 80: module 'Dev:Arguments' not found.
The Book on costumes, or Scholars Guide to Dwarven Costumes, is a quest item found during The Giant Dwarf quest. It cannot be read. In order to get the book you have to talk to the librarian in Keldagrim during the quest and then search a nearby bookcase. The book is given to Vermundi to make the Exquisite clothes for Riki the sculptor's model.