I thought it might be worth highlighting that as a result of Amazon price-matching the Nook Store weekend sale most of the volumes of
The Wheel of Time are between $3.99 and $4.99 apiece, 50% off, for US Kindle and Nook. Here are
Amazon and
Nook Store links for the first book of the series,
The Eye of the World. The only one not on sale is the most recent, final volume,
A Memory of Light, which doesn't come out in e-book format until Tuesday, and is preorderable for a hefty $13.49. Edit: on further examination the prequel novel
New Spring is not on sale at either site, though it's only $5.99 at Amazon as a regular price.