AP English - Cliffs prep book question

<p>Hey guys - I was wondering, for those of you who have 4th edition of Cliff's guide for AP English Lang, is it significantly different than the 3rd edition?
The 3rd edition is pretty much all practice tests (6) and explanations, along with MC/FRQ strategies. I'm not sure if the test has undergone any major changes between when the 3rd edition was published (2006 I think) and the 4th (2012.)
Thanks in advance!</p>