Outland Tailoring

Although the Scryer's Tier have bookcases with stuff to learn for the different professions, you wont learn anything from a bookcase that isn't available at any profession trainer.
I took my Priest to the Tailor Trainer in Honor Hold, skilled him all up to 35/75 and learned everything [npc=18772] could teach me. Then I checked out the trainers in Shattrath including this bookcase, but none of them had anything to teach me as I already have learned everything in Hellfire Peninsula.

Outland Tailoring has changed. Go to Shattrath take alot of netherweave. Go to the Scryers tier you will not need to be friendly with them, but dont be friendly with Aldor either. Go to the bookcase marked tailoring leatn outland tailoring, make alot of netherweave bolts. By the time bolts turns gray you will have a few more patterns you can learn.

This can be learned at Shattrath at the Scryer's Tier; at 43.8, 90.4, inside the building you will find a number of clickable bookcases, each of which is named after a specific profession. Click the bookcase labeled "Tailoring" and you will be able to interact with it as you would with a regular tailoring trainer.