'One strength of Amendola and Tsujikawa's book is the level of detail it provides on dark energy models … comprehensive.' Joshua Frieman, Physics Today
1. Overview; 2. Expansion history of the universe; 3. Correlation function and power spectrum; 4. Basics of cosmological perturbation theory; 5. Observational evidence of dark energy; 6. Cosmological constant; 7. Dark energy as a modified form of matter I: quintessence; 8. Dark energy as a modified form of matter II; 9. Dark energy as a modification of gravity; 10. Cosmic acceleration without dark energy; 11. Dark energy and linear cosmological perturbations; 12. Non-linear cosmological perturbations; 13. Statistical methods in cosmology; 14. Future observational constraints on the nature of dark energy; 15. Conclusion and outlook; 16. Answers to the problems; 17. Mathematical appendix; Index.