http://www.islandpress.org/sale
A couple notes:
1. The titles are even cheaper from Amazon.com — $4.86 in most cases. The complete list of Island Press books on Amazon is
here.
2. The sale prices aren't showing up in the Kobo store, but I spoke to a customer rep who told me he'd submit an error report, which he hoped would resolve the problem within 48 hours. You
can use discount coupons with Island Press books, so it may be a good idea to wait before purchasing.