This technical book describes more detail about the multiverse and travel into it via uniship. The author describes the books contents as follows: In volume 1 of All the Universe! we described details of the exploration of the multiverse - the flat 16-dimensional space that contains a multitude of universes. We described details of a type of starship called a uniship that could escape from our universe and travel to other universes. The discussion was based on an Extended Standard Model of Elementary Particles and an extended Quantum Gravity - both based on the four-dimensional space-time with complex valued coordinates. We also shown that a complex sixteen-dimensional multiverse consisting of universes embedded in a flat space, with each universe satisfying a complex Wheeler-Dewitt equation, leads to an understanding of many features seen in our universe: the origin of the Cosmological Constant, the spatial asymmetry of our universe, and the web of Galaxies recently found in our universe. It also suggested a wormhole connection to a sister universe and the existence of a baryonic field between universes and particles (Blaha (2014a)). The combination of these successes in explaining both the microscopic and cosmic features of our universe, and resolving quantum issues of the Wheeler-DeWitt equation, strongly suggested our theory was in accord with Nature. It gave us a reason to look into the distant future with confidence. In this volume we look particularly at the slingshot mechanism using neutron stars to propel starships into the multiverse. The existence of the multiverse implies every neighborhood of every point in our universe contains points of the multiverse. In particular, these multiverse points are points in the Flatverse - the flat 16-dimensional space between universes. Thus we will consider infinitesimal entry into the Flatverse from a point in the universe as well as large scale entry into the Flatverse by uniships using the slingshot mechanism. Both volumes assume the existence of a baryonic force (between baryons such as nucleons) that leads to baryon number conservation. We perform a preliminary calculation of this force based on deviations in measurements of the gravitational constant G, and suggest a precise experiment to determine the baryonic force coupling constant. We examine the possibility of making a compact device that would create a strong coherent baryonic gauge field, a PHASER, for microscopic entry into the Flatverse, the possibility of "jumps" in space, the strong possibility of a relation to quantum mechanical entanglement due to the embedding of our universe in the Flatverse, and a seemingly improbable connection to spirits and the "Spirit World" due to the embedding of our universe in the Flatverse. We also consider the possible types of slingshot mechanisms - especially an umbrella uniship capable of travel in any of the fifteen spatial Flatverse dimensions. We investigate the space-time within a uniship after it emerges from our universe. This book addresses topics that will be of significance after perhaps tens of thousands of years of research and development - perhaps 50,000 years (four times the approximately 12,500 year period from human hunter-gatherer clans to the present.) The uniship features that we will describe have many radically different mechanisms. It does not resemble science fiction depictions of starships that are seen in popular movies and television shows. Volume 1 and this volume portray as much as we much as we can forecast about starships and uniships. The descriptions are based on reasonable projections of Physics and certain required assumptions that are reasonable based on our work on the Standard Model, General Relativity, and complex-valued spatial coordinates both in our universe and in the multiverse in general. The presentation in this book is largely self-contained but it is based on earlier books.