I have created a LinkedIn group for readers of my PMI-ACP Exam Prep book. The group combines the features of a study group and Q&A forum along with exam taking tips. Once we have critical mass I will focus on a chapter for 2 weeks discussing topics and answering questions.
I would also like to hear from people after they take their exam to get feedback on how using the book worked for them and any suggestions for the second edition. If you are interested, please help me in spreading the word and join the group Here.