Just a suggestion: Do not buy any book in Kathmandu. First, come to US and then visit your professor and your department. Just find out what books/course materials they use. You can burrow or buy those stuffs once you are here. Again, i suggest you not to buy any book in Kathamndu, since you could get international versions textbooks in cheap price online. Also, once you are here, you could download pdf versions of ebook that you mentioned...