We sent the first set back, because we thought Chapter One was missing from Book 5. We receiving a replacement set and again thought Chapter One was missing from Book 5. Thanks to a review we found on a major online book store, which said Chapter One of Book 5 was on track 17 & 18 of CD 4, we found that to be true. Chapter One of Book 5 is on CD4 after the end of the concluding music of Book 4 which is when Book 5 starts. So Book 5 actually starts on CD4.
This series is as you probably know coming to theaters and is also availble in paperback, which we have. My 1st grader isn't able to read that level yet and we have a long commute to school every morning and home every afternoon so we listen to books on CD. We purchased this set and the kids loved them. It is also a series that parents can listen to without being bored. Overall I would recommend this to anyone.