Good Mythology Books

Hi. I've been looking for a good, comprehensive book about various mythologies, but mostly Greek mythology. I tried a few, but none tried to be objective. I just want to know what the myths were without anyone rambling on about how civilized the Greeks were and how creative they were compared to other barbarians. Not that I have anything against them, it just reads more like praise than a presentation of the myths. Other mythologies would be welcome too, especially Chinese and Norse. Thanks in advance.