Difference in Western Heritage (AP Euro) editions?

my school uses the eighth edition of kagan’s western heritage since 1300.
i know that theres newer editions.
is there quite a significant change in the editions or is the eighth edition good enough to study for the AP?</p>

It should be fine. The AP exam won’t cover much (if anything) past the Treaty of Maastricht (1991) for at least another 5 years.</p>