Nook users can pre-order tomorrow's status quo-shattering Green Lantern #20, Geoff Johns's final monthly issue after nearly a decade on the series, for $2.99 right now at Barnes & Noble's website.

That might not seem like such a big deal, except that Johns's much-hyped finale is an oversized, multi-artist affair with a cover price of $7.99, meaning that this likely error nets fans a $5 savings, for as long as it lasts before it's caught.

So, fans buying from Barnes & Noble will pay only 37% of the cover price, at least for the time being.

Luckily for everybody, Barnes & Noble recently rolled out an app update, so that fans using the Nook app on Android or iOS can use Nook Comics for the first time.

Green Lantern #20 is on the stands tomorrow. According to solicitations, “It’s the final battle against the First Lantern and the Guardians in this, the extra-sized finale of Geoff Johns’ historic run on the title! Plus, don’t miss a special retrospective on Geoff’s run on GL!”