Buying a book online just isn't that complicated. One shortfall is the difficulty in finding its customer service telephone number to talk with a human being. The number exists but it is buried deep in the Web site. Standard shipping takes about five to nine business days. As for returns, Amazon will give a full refund on returned items up to 30 days.
Some sites allow returns to be made at their retail stores.
Otherwise, it is one of the easiest and most convenient options. Do not assume that buying online is cheaper. You miss that great smell of a real bookstore.