after words is next on book tv, harvard business school professor eugene soltes on book why they do it. he spoke to 50 executives involved with corporate crime. >> professor soltes, good morning. >> good morning. >> pleasure to speak to you about your book why do they do it. how is it that you came upon writing a book about the prospectives and the background and the thinking of white collar criminals? >> i'm a financial economist by training and this book actually began all the way back when i was a graduate student working on large data set like most graduate students are doing at 3:00 in the morning and came across msnbc lock-up. they were interviewing convicted felons most were violent offenses, murderer, rapists, most violent cases. donating generously and wondered what happened to these guys, the many people really respected and they were convicted for offenses and then they disappeared. and so this project began. it was really a personal interest. this was 2000-2008, that evening out of personal curiosity, this isn't a scholar project at all, i did what a lot of people think whe