Complex sentence: Gribbin also argued in his book that the designers of the universe could create new universes by manufacturing black holes, he describes in detail in his book how this could be done in three different levels of operation which do not contradict the laws of physics.
Split into simpler sentences: Gribbin also argued in this book that the designers of the universe could create new universes by manufacturing black holes. He describes in detail how this could be done in three different levels of operation which do not contradict the laws of physics.