Mötley Crüe and Sixx:A.M. founder Nikki Sixx is now a four-time New York Times best-selling author with his new book, THE FIRST 21: How I Became Nikki Sixx entering the coveted list at #8 on the Hardcover chart and #11 on the Combined Print And Ebook List. THE FIRST 21 joins Nikki Sixx’s other three