Duff McKagan (Velvet Revolver, Guns N’ Roses, Loaded) joined his former Guns bandmate Steven Adler and Adler’s Appetite on stage this past Monday night (February 28th) at the Underworld in London, England. They performed two Guns N’ Roses classics — “My Michelle” and “It’s So Easy”.

McKagan has played with Adler’s Appetite before. It took place July 28, 2007 when he and fellow ex-Guns member Izzy Stradlin jammed with Steven’s band during its headlining appearance at the Key Club in West Hollywood, California. Slash did make it to the venue earlier in the night and had every intention of playing with Adler, but something reportedly came up that forced him to leave before he could go up on stage and performing with the other guys. As expected, Axl Rose was a no-show at the event , which was meant to celebrate the 20th anniversary of GN’R’s classic debut.

McKagan joined Axl Rose on stage for the first time in seventeen years this past October 14, 2010 in London.

Duff will join Steven and Slash and release his own book on Oct. 11th via Touchstone Fireside, a division of Simon & Schuster.

Duff revealed the book’s release date during a brand new interview with VH1 Radio Networks’ Dave Basner. McKagan said, “I finished it about a month ago [and it has] a lot of words in it.” In a 2010 installment of his weekly column, which appears on Reverb at SeattleWeekly.com, McKagan stated about the book, “I want to make clear that this book is not a GN’R ‘tell-all’ or some other such ‘rock’ book. There are a lot of those at this point. Sure, I will touch on all of that, as it is part of my story, but only just a part of it. Rather, it will be a story of an ordinary guy who met with extraordinary circumstances, and the circumnavigation through these situations. If you have been a reader of my column, then you get the general idea of my headspace. I WILL be writing this myself, thick or thin.

Based on the 40-page proposal that made the rounds of publishing houses in February 2010, McKagan’s book will begin on the day in 1994 when his pancreas burst from alcohol abuse. It will recount his rise through the music scene, his fall into drug abuse and his recovery, which included two years of celibacy and a degree in finance from Seattle University.

Here’s a bonus interview with Duff from the Birmingham Guitar Show, which took place February 26-27 at the New Bingley Hall in Birmingham, England: