I passed PMI-ACP exam two days ago, I would like to thank you, Mr. Mike Grifith's, for a great book, which is the only book I used for the exam preparation, exam tips are important and help it me so much, my lesson learned and the resources I used:
1. PMI –ACP exam pre-second edition.
2. PMI-ACP Exam Prep from Udemy-Joeseph Philips.
3. PMI-ACP Agile Certification Exam Tips and Resources from Edward Chung.
4. PMI Agile practice Guide.
5. FastTrack simulation.
6. PM Precast exam simulation: 480 exam questions, it is good questions and very close to the real exam.
As general to pass the exam you should understand agile concept deeply (being agile).