'An impressively complete and beautifully illustrated overview of our current understanding of cosmology. Serjeant achieves a nice balance between the excitement of results from the forefront of research and a clear presentation of the basic tools needed to understand them.' Professor John Peacock FRS, University of Edinburgh 'This is an excellent book for graduate students in many areas of astronomy and cosmology. I am very impressed by its style, clarity of presentation and the choice of topics covered.' Professor T. Padmanabhan, Inter-University Center for Astronomy and Astrophysics and author of Gravitation: Foundations and Frontiers 'Serjeant's book is beautiful, filled with full-color photographs and cleanly rendered plots and diagrams. … his treatment is contemporary and addresses a broad range of topics in informal, enthusiastic prose.' Physics Today '… a very modern textbook … richly illustrated in full colour throughout … very well written and easy to understand even if the topic is difficult … The quality of the paper, the print, and the book as a whole is excellent … can be recommended without restraint to advanced undergraduates as well as to experts … an up-to-date reference in observational cosmology.' Contemporary Physics