Lorenzo Robbiano points out that Springer is discounting some prices on some books. For example, Kreuzer–Robbiano’s “Computational Commutative Algebra 1 and 2″ are discounted on sale at €39.54 instead of the usual €64.15/€58.50. The discounts don’t appear to be available in the US, but Lorenzo tells us they are valid in some areas until July 31 2010.