Ellen Ruppel Shell's Slippery Beast is a fascinating account of a deeply mysterious creature?the eel?a thrilling saga of true crime, natural history, travel, and big business. What is it about eels? Depending on who you ask, they are a pest, a fascination, a threat, a pot of gold. What they are not is predictable. Eels emerged some 200 million years ago, weathered mass extinctions and continental shifts, and were once among the world's most abundant freshwater fish. But since the 1970s, their numbers have plummeted. Because eels?as unagi?are another thing: delicious. In Slippery Beast, journalist Ellen Ruppel Shell travels in the world of "eel people," pursuing a burgeoning fascination with this mysterious and highly coveted creature. Despite centuries of study by celebrated thinkers from Aristotle to Leeuwenhoek to a young Sigmund Freud, much about eels remains unknown, including exactly how eels beget other