Coming on November 1st to coincide with the 40th anniversary of Fleetwood Mac's sprawling 1979 double album Tusk, is what is assuredly the definitive book on the subject. The band's legendary co-producer Ken Caillat, along with the Mac's engineer Hernan Rojas, have collaborated on the new book, Get Tusked: The Inside Story Of Fleetwood Mac's Most Anticipated Album, via the Rowman & Littlefield trade imprint Backbeat Books. The book follows Calliat's 2012 memoir on the band's Rumours sessions, titled, Making Rumours.

According to the press release for Get Tusked:

In this behind-the-scenes look at the making of Fleetwood Mac's epic, platinum-selling double album, Tusk, producers and engineers Ken Caillat and Hernan Rojas tell their stories of spending a year with the band in their new million-dollar studio trying to follow up Rumours, the biggest rock album of the time. Following their massive success, the band continued its infamous soap opera when its musical leader and guitarist, Lindsey Buckingham, threatened to quit if he didn't get things his way, resulting in clashes not only with his band but especially Caillat, who had been essential to the band's Grammy-winning sound.

Hernan Rojas's story recounts a young man who leaves Chile after General Pinochet's coup to seek his future in the music industry of Los Angeles, where he finds success at one of the hottest studios in town. When Fleetwood Mac arrives, Rojas falls in love with its star singer, Stevie Nicks, and the two of them become romantically involved.

Lindsey Buckingham recalled to us the differences key between recording Rumours and Tusk: "Rumours was basically just the normal studio situation. Tusk was where I was trying to stake out some new ground -- where I was working at home, and on my own some of the time, and bringing it in (to the studio) -- and those two approaches were both valid."

Fleetwood Mac's Tusk, which cost over $1 million to produce, was originally released on October 12th, 1979 and fell short of commercial expectations.

The double album followed the band's 1977 mega-platinum Rumours collection, and was certified double platinum, peaking at Number Four in the U.S. and topping the charts in England.

AUDIO: LINDSEY BUCKINGHAM SAYS FLEETWOOD MAC'S 'RUMOURS' AND 'TUSK' ALBUMS WERE RECORDED VERY DIFFERENTLY