Higher Learning

The achievement where you read various books spread throughout Dalaran. I have been looking for these things forever and still have not read a single one! After looking up the locations of the books on thottbot.com I started running around to each one throughout the day and even logging out where one would spawn and still nothing. I really want the little Voidwalker pet (I cannot remember the actual name of the pet) and the only way to get it is to have completed this achievement. Can anybody who has done this acievement give any tips to us having no luck finding these things? I'm beginning to become extremely irritated because I can't find the books!

TL