Whether they recognise it or not, everyone has a worldview, a way of understanding the world in which they live and their place in it. The difference between these worldviews means that physically people may inhabit the same universe, but mentally the universes they inhabit may be very different. For example, some people may inhabit a mental universe in which there is a single creator God, others may inhabit a mental universe where there are a multiplicity of different gods, and yet others may inhabit a mental universe where there are no gods at all, and in which the world is governed simply by the random movement of material forces. Given the existence of this range of mental universes, the aim of Living in the Multiverse is to do three things. Firstly, to explain the nature of the Christian universe and the reasons for believing that this universe exists not only as a mental concept, but as an objective reality. Secondly, to introduce Christians to the other main mental universes inhabited by people living in the UK today, explaining the reasons for their existence and looking at how they are similar to and different from the Christian universe, particularly in their views of what makes for human flourishing. Thirdly, to explore what it means for Christians to live well in the midst of these multiple mental universes.