Our boundless curiosity leads us to observe the space with a great interest in knowing it. Looking at the sky, we ask ourselves: how did the stars originate? Where did the sun and moon come from? What are planets made of? What is our place in the universe?
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.