Should I use an old Crash Course book to study for the AP Exam?

So the AP Exam is coming up of course, and I found an old book my brother had for this exam that was published in 2011. I heard a lot of good things about it and I’m planning to use it to prepare for the exam, but is it safe to use even though its old? I know that history doesn’t change and all that but is it teaching all the material i need to know? If so what’s the point of the author making a new book every year? Thanks

of course. the content does not change much, plus its not about the questions but more about making connections and stuff and any review book teaches you that. i did not use review book for my exam and got a 4, so with review book you can definitely get a 5 even if it is 2011 year

@maxim2001 Oh okay. But still, what’s the point of the author making a new book every year?

to get the money because people want to buy the most recent book, even though they have little differences, except they might use last year exam’s questions