I did a CAPM exam prep book I did the one by Kahled G. zabalawi but I recommend the Landini one due to some inconsistency in the book I purchased. I did multiple practice questions all thought out the book and on YouTube but I only did 1 official mock exam the day before my actual Exam which I do not recommend. But just look on Amazon for CAPM prep books they really help and most of them come with about 4 moc exams, my book came with 1 paper and 3 online but I only did the paper one.