A comprehensive guidebook to Comet ISON, C/2012 S1 (ISON), which could by year-end 2013 become 'The Great Comet of 2013', possibly 'The Comet of the Century' and maybe even a 'once-in-a-civilization' comet. This book, the Kindle version of which will be regularly revised during the rest of 2013 (for free downloads), captures all that is known of this sungrazing (but not a Kreutz) comet, which, with luck, on Boxing Day, i.e., December 26, 2013, will...