I found this achievement easy with a little planning. Join your server's higher learning channel. Use a chat addon (I use
chatter) that lets you get audible and warning notices of a word showing up in chat. I got a raid warning every time the word "real" came up in chat.
I kept a hearthstone available to hearth back if a real book showed up. Others in my guild were doing it too, and it was fun to share the endeavor. I had my pet in under a week.