Don't waste your time on this book. I feel completely ripped off. As one customer said the charts are off and he doesn't even get the date right for the chart on one of the cases...for example..Danielle vanDam did not go missing on the night of Feb 2, 2002, she was reported missng on that morning, not on the 3rd. Also, Feb 2, 2002 was not on a Friday as he states. It is easy to look at a calendar to get a date right and read information on the case to get facts correct. I'm very disappointed.