<p>I have a 2nd edition Cliffsnotes AP biology book and I believe it is the 2001 edition, so it is about 8 years old. Is this outdated? I am basically self studying so I need a book that is thorough.</p>
<p>And if I only study with this book, would it be enough to get me a 5? Or should i supplement it with another book?</p>
<p>It’s fine. My class uses the 2nd edition and all the material seems up to date. I heard cliffnotes is all you need to score a 5 on the ap exam, but I am not completely sure about that. If you didn’t already start self studying, I wouldn’t recommend a textbook. The ap exam is only a month away so you should invest all your time into cramming.</p>