As the introduction of the book makes clear, the authors aim for a wide audience for whom Cosmology is not a core discipline. Not only do they do a good job in meeting this goal, but they also present the physical concepts and experimental results in a way that provides new and deep insights to those whose main interest is Physics. For instance, the discussion of the Big Bang and the cosmic models provides an excellent complement to the mathematical presentation of authors like M.V. Berry. Equally, there is a plethora of material that describes experimental results like those for General Relativity: bending of light under the infulence of the sun's gravity, the Eotovos experiment to demonstrate the Equivalence Principle, etc.
The book covers a broad field: Some historical aspects, Special and General Relativity, the Big Bang and various cosmic models, dark matter, and large scale structure.
The glossary and the authors' web site provide further information on the subject.