I saw on the auction house earlier today a set of cloth that looked like pajamas and was wondering if these were crafted or from something else? The wiki has an odd layout to me (probably because I'm used to wowhead's setup) and could find any real info.

The set in question is the crescent moon nightgown/slippers and nightcap.

Also how do you learn new items? Is it automatic or is there a trainer I'm not seeing in the guild hall?