Mount Tambora is a volcano located in Indonesia. The volcano erupted in April 1815, spewing volcanic ash, debris, and lava forth. The eruption was exceptionally powerful, and the dispersion of gas wound up disrupting the climate. This climate change decimated crop production and changed temperatures, resulting in the Year Without Summer. The information about the volcano and the volcano rating scale was pretty interesting, though the book itself was repetitive and pretty dry. I'm glad this was on Audible Plus, because I would have been sad if I used my credit for it.