Introduction to Modern Cosmology - Liddle
- This is a brilliant introduction. If you've never come across cosmology and are ~ 3rd year undergraduate then this is the perfect starting point in my opinion.
Cosmological Physics - Peacock
- This is a very good book on cosmology. Perhaps a tad more dated than Liddle's book but covers all the important things in a very good way. Has introductory chapters on GR, QM and Field Theory that really serve as quick refreshers of some of the basics.
Cosmology - Weinberg
- Very nicely written with most things you could want but not the starting place for anyone new to the subject in my opinion.
Cosmology - Origin and Evolution of Cosmic Structure - Coles and Lucchin
- This is another nice cosmology book emphasising the structure formation aspects of cosmology.
As mentioned above Dodelson's book is a very nice book too.
You can look at the table of contents and other reviews for most books. Hopefully this should give a reasonable starting point :).