Goldsmithing & Silver Work by Carles Codina, is an incredible book.
It starts out with the general details of tools and materials, moves into short sections about a variety of techniques, and then into more extensive techniques towards the back of the book. Some techniques covered are creating a bowl from silver using a lathe, as well as traditional raising techniques.
There are also fabulous directions for creating hollow rings, stone settings, and working with hollow tubes. Codina's technical skills are vast and never cease to impress me.
In addition to fabrication, Codina displays a few casting techniques which are steeped in history, such as ashanti casting, cuttlefish bone casting, delft sand casting, casting on natural stone, and ceramic shell casting.