A few of you have asked about this job, so here's the website that tells all about it and includes a video as well. http://www.sekjobs.com/
Because we're all hired by the employment agency, I'm not sure about discounts on books or anything, but intend to find out when I start work. If you're a member of workampers.com, there has been a fairly active discussion on a few forums there from new people and people who worked for amazon.com last year. It sounds like pretty hard work, at least being on your feet for a 10-hour shift, but I understand from last year's employees that there is the chance for overtime as well.
I'm doing it as a new adventure as well as to earn enough money to perhaps take it easy the rest of the winter--we'll see. So, check out the website.