"This book analyses the physics of complex systems to improve the problems encountered in teaching and research. Building on the work of Kurt Gödel (including his incompleteness theorems) it considers the concept of time and the idea of models to assess the state of physics in general. Using both general and practical examples, the idea of information is discussed, emphasizing its physical interpretation before considering the separation of scales, debates ideas in depth using examples and evidence to provide detailed considerations on the topics. Using the authors' own research on these topics, this book puts forward the idea that the application of information measures can provide new results in the study of complex systems. Not only helpful for those already familiar with the concepts who wish to deepen their critical understanding, Physics of Complex Systems will be extremely valuable for those readers beginning their journey into complex systems, this work will encourage readers to follow and continue these ideas, enabling them to investigate the various topics further"--