Searched the forums for a similar thread but since I didn't find any I'll post. If it is indeed a repost let me know!
The exploit itself is the same as all the other CRZ exploits, but none of the threads I found contained any guides on how to get Higher Learning using it.
Since I'm not going to include any guides on Peerblock in this thread, make sure to read up on Piju's guide on Peerblock and CRZ disabling here: Peerblock and you - A guide to exploit CRZ
For those who don't know Higher Learning is an achievement earned in Dalaran by reading 8 rare books found around the city. Each of these 8 books also share their spawnpoint with 3-4 other books that do not count towards the achievement ("fake" books). Upon completing the achievement you'll get a book that ports you to one of the towers where you'll receive your very own Kirin Tor Familiar.
Getting the Achievement:
Prerequisites:
Noodle Cart Kits (to check each spawnpoint 9 times from different phases you'll need 72, probably less. Cheapest way is to make them, but you can also buy them @AH)
Peerblock + sufficient knowledge gained from reading Piju's guide
1. Start with disabling CRZ in Dalaran. (You'll see "Transfer Aborted: Instance not found" if you've done it correctly)
This can be done coming from 9 zones in Northrend (excluding Crystalsong). All of these give you a different phase so you have 9 chances every 3-4 hours to get each book.
2. Find one of the 8 spawnpoints for the books. (Spawnpoints: map - waypoints)
3. Use a noodle cart right next to one of the spawnpoints, causing you to phase into a player-empty Dalaran with all books spawned.
4. Read the book by simply right clicking it (there's no need to exit the noodle cart before reading it like when looting mobs).
Repeat these steps on all the different spawnpoints and after a few spawns you'll have 'em all!
Keep in mind that some times "fake" books will spawn, but just wait 3-4 hours and come back again!