Ever Since Darwin is the first collection of Gould's essays, published back in the 1970s. Thirty years is a long time for a science book, but there's several essays worth reading in this one. Gould writes about Darwin, naturally, about human evolution, odd examples of evolution in practise, history of life, theories of Earth, abouts sizes and shapes, science in society and the science and politics of human nature.
It's a wide selection of topics and Gould sure knows how to write an interesting essay. There's plenty to learn between the covers and a fair dose of entertainment as well. Despite its age, Ever Since Darwin is well worth reading.