How about The Fabric of the Cosmos by Brian Greene? It is a clearly written account of cosmology, though with more emphasis on string theory than on other topics.

As for comparing and explaining the different interpretations of quantum mechanics, I am not aware of any book that does what you ask for. The clearest explanation of some of the interpretations of quantum mechanics that I've read so far is actually right here on Less Wrong, in the Sequences. However, that focuses on a few of the interpretations, without context of the others, and I had to read a bunch of scientific papers to start to get some of the missing context, though I still feel like there are gaps in my knowledge. I too would be interested in reading a book that properly explains and compares the different interpretations of Quantum Mechanics, so I'll be checking back at this thread to see if someone recommends one.