This book introduces the current state of research on dark energy. It consists of three parts. The first part is for preliminary knowledge, including general relativity, modern cosmology, etc. The second part reviews major theoretical ideas and models of dark energy. The third part reviews some observational and numerical works. The aim of this book is to provide a sufficient level of understanding of dark energy problems, so that the reader can both get familiar with this area quickly and also be prepared to tackle the scientific literature on this subject. It will be useful for graduate students and researchers who are interested in dark energy.

• Preliminaries in a Nutshell:
  • Gravitation
  • Matter Components
  • Cosmology
• Theoretical Aspects:
  • Introduction to Dark Energy
  • Weinberg's Classification
  • Symmetry
  • Anthropic Principle
  • Tuning Mechanisms
  • Modified Gravity
  • Quantum Cosmology
  • Holographic Principle
  • Back-Reaction
  • Phenomenological Models
  • The Theoretical Challenge Revisited
• Observational Aspects:
  • Basis of Statistics
  • Cosmic Probes of Dark Energy
  • Dark Energy Projects
  • Observational Constraints on Specific Theoretical Models
  • Dark Energy Reconstructions from Observational Data

• This book presents comprehensive overview of theoretical and observational aspects of research on dark energy.
• Almost all of major works on this area are introduced.
• Students and Researchers can use this like a handbook