so basically adam schuman comes home, and thank you for your service begins with them. n the opening line of the book, two years later, adam drops the baby and the book goes on from there to trace not only adam, but his wife, their children and this hole clustered in kansas of people who serve well and now are trying to get better. >> i have a question about the reporting of the book, david. it reads seamlessly now but how do you go about advising a plan of attack for the porting of it? you've got these vets around the country. you don't know which ones necessarily something, something that would be useful to you in your book will happen to. how do you, with one family, at a time, how do you devise a plan to use your time most efficiently? >> if the figures are right, of the 2 million americans who were deployed directly into iraq and afghanistan, if the guesses are right, some 25 -- 25% of it was some type of psychological wounds, to contend with. that's a lot of characters to choose from, right? so adam was my starting point, and again, the type of journalism i do depe