There is definitely a shopping cart when you're finding books (I was just now looking at it ) -- what is sorely lacking, however, and may be what PHugger is referring to is there isn't any way to
download more than one book at a time, except possibly you may be able to download all the books you've
just purchased, I don't remember for sure.
Some sort of "select books to download" function is a big ol' smelly hole in the ConnStore's feature set.