Bryan L. Ciyou, Esq. has written a book called “Gun Laws By State” that can be purchased or viewed online for free. The online version will be continuously updated and allows readers to ask questions about any paragraph in the book. Other readers or the author can answer the questions. These questions and answers are displayed to the right of the page so you can see what people have been discussing. It is a very nifty site.
I hope people will support the author by buying the book because the interactivity of the free website make it a better resource than a hardcopy (or the offline e-book on a kindle).