A textbook on cosmic evolution offered by NASA and containing 15 chapters written by scientists and experts from around the world.
Free Anthropology & Archaeology Textbooks
Dream of exploring ancient tombs or unearthing a full dinosaur skeleton? Or maybe you want to study the inhabitants of some isolated village where they live the same way as they did 300 years ago. Either way, the textbooks here might help you in your endeavors.
Both Anthropology and Archaeology study the science of humanity. They are generally considered one of the social sciences but also have elements of biology, history and linguistics. Rather than attempt to place anthropological and archaeological works within those categories, it seemed important enough to stand on its own in this joint category.
At the moment, The Free Textbook List only has a few textbooks here. Hopefully, at least one of them will prove helpful in your studies.