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.