Engineering at the expert level breaks into two disciplines: gnome and goblin. While I think it is a waste, you should be aware of gnome specialization. They make items and gadgets that claim to change the world, but rarely work.
<name>, read this manual. If you wish to learn how to make metal paper weights, then take the manual to Oglethorpe Obnoticus in Booty Bay. Remember - membership is permanent and prevents joining the other discipline, so make sure you are sure before finishing his task.
You've come to learn about gnome engineering, eh? Well, you've come to the right gnome. While the ruling faction of Gnomeregan may use politics to ostracize those they view as an intellectual threat, they know that knowledge is something they cannot control.
They and I both know that when I left Gnomeregan, they lost one of their greatest gnome engineers alive today. If you're a capable student, I'll teach you what I know.