All of them are new enough, but not all of them have the approach that they discuss why these features are needed etc. e.g. Physical Foundations of Cosmology - Mukhanov is more of a book going through the physics to research in cosmology, not so much about observations etc.
You can go to e.g. amazon, and the publishers websites to read their table of contents, or try to find them in your library.
All the books I listed I either own or have used, and I am quite content with them :-)
The 'newest' books on cosmology is Weinbergs and the oxford companion to cosmology (should be available at paperback)
http://www.oup.com/uk/catalogue/?ci=9780199560844
http://www.oup.com/uk/catalogue/?ci=9780198526827