The last frontier in Texas, the Trans-Pecos region is an immense and remote series of desert basins in the western-most part of the state. Columns of rock and stony debris dot the landscape, with various peaks, such as the notable El Capitan, rising from a long-forgotten sea floor. While the acidic and shallow desert soil only allows for scrubby vegetation in many places, what survives is rugged, colorful, and adaptable. Far from just an arid region, however, the Trans-Pecos is also home to grasslands, wetlands, and even woodlands. Animal life varies considerably, from the Black-tailed Jackrabbit and Desert Cicada to Bighorn Sheep, Black Bears, and Mountain Lions. Complete with an introduction chronicling the stories of biologists and naturalists who have explored and defined the ecological areas of Texas over time, explores the formation of the region more than 600 million years ago, the adaptability of its ecosystems, and the conservation efforts to keep these wildly diverse environments flourishing. Detailed descriptions, vivid anecdotes, and vibrant pictures of the features that make this region so unique emphasize the rugged grandeur of the Trans-Pecos.