Starts with an overview of "draconology", then goes into what is, actually, more-or-less a field guide. As seems to be the case with a lot of sea/lake monster studies, it's somewhat focussed on classification, finding a way to divide the myriads of reports into a finite number of identifiable and believable creatures. Indeed, this book takes Heuvelmans' classic classification scheme and updates it with a few new and a few combined types, to end up with a total of 14 separate cryptid types in the guide. Each section starts with a detailed overview and description of the type, and the evidence that went into making it a separate classification, and then is followed with a group of specific reports of sightings.There's also an appendix at the end going over the most likely places in the world to see the creatures, though I'm not sure I agree with its ranking ("Chessie" is ranked fifth, even though there were never many sightings, relatively, and it hasn't been seen in decades.) It's a very well-put-together presentation of the evidence, and a must-have for monster-hunters. ( )