Have you ever seen a manhole cover with little glass circles in it and wondered why it was different from the others? Did you ever imagine that there were actua

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Marc E. Epstein provides a complete biography of Harrison Gray Dyar, Jr., one of the most influential biologists of the twentieth century. Epstein chronicles Dy

In 1801 Elias Hasket Derby Jr. leaves his two year retirement. His father, the country’s first millionaire, has left him a money pit that many would consider

The New York Times Bestseller! The story of an outcast boy, his eccentric dad, and the scary underground world they discover through secret TUNNELS.14-year-old