Most Christians are unaware that there is such a thing as a biblical cosmology. That is, we do not have a clear idea of the whole of creation, both visible and invisible, its parts and realms, and how they fit together. We live by bits and pieces of conflicting notions supplied by the Bible and the secular world, and there is little comprehension of the overall design of reality and the all-embracing vision of creation that the Bible provides and the Church has taught for centuries. The matter seems too complex for the typical contemporary Christian and so the matter is dropped as irrelevant. The consequences are deadly; ignorance breeds arrogance, indifference, and finally spiritual death. The Little Book of Big Frontiers intends to make the complex issue of cosmology understandable. Vivid and ordinary stories and images are used to illustrate extremely difficult concepts that will open up new frontiers for the reader. Readers will come away with a whole new understanding of the cosmos and how it works, integrating the interior realties of the soul with the world around them, rediscovering realms that were once known to the early Christians but, alas, are now lost within the secularization of our culture.