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For more than 250 million years, the primeval oceans of the Paleozoic teemed with trilobites. These hardy invertebrates evolved into an astonishing array of separate species -- more than 25,000 at last count -- and much remains unknown about these once-ubiquitous creatures. Fossil enthusiasts are captivated by trilobites' diversity and adaptability, enthralled by the possibility of catching a glimpse of a transcendently strange past.. Andy Secher -- one of the most prolific trilobite collectors in the world -- takes readers on an entertaining and enlightening journey to the distant epoch when these ancient arthropods swarmed through the seas. The Trilobite Collector's Guide presents a series of "Top Ten" lists covering everything from celebrated Cambrian localities and world-class fossil shows to invaluable collecting tips and ways to spot a fake trilobite.