AP Euro is the shit. I used the PR book and Viault's Modern European History last year and found the content review of the Viault book to be a fantastic, no bullshit approach and the PR had good practice tests.
If you mean actual history and want an amazing reference check this one out. https://www.amazon.com/Modern-European-History-Birdsall-Viault/dp/0070674531
Modern European History https://www.amazon.com/dp/0070674531/ref=cm_sw_r_cp_api_NDeQzb2VA6DF1