The idea for this type of study had been long in the making. The second author of this book interviewed California and Illinois gang members in prison (Decker, Bynum, and Weisel 1998). In 2001, he produced a training manual on gangs on the street and in prison for the American Correctional Association and, together with Mark Fleisher, guest edited a special issue of Corrections Management Quarterly on gangs and security threat groups. Fleisher and Decker identified a range of issues related to gangs in prison, while also recognizing the challenges of reintegrating gang members in the community (Fleisher and Decker 2001a, 2001b).