Via promotional emails from Powells.com (at least they haven't gone under yet)...
How The Dose Works--Seven days a week, the Daily Dose brings a reader's review to your Inbox — along with a chance to win free books!
Each day shortly after midnight we post the day's featured item on our web site and in our email to Daily Dose subscribers. The reader whose comments we use has until day's end (11:59 p.m. Pacific Time) to visit our special contest page and claim the prize. Each day we add $20 credit to the available total — until someone wins free books. Then the next day it all starts again.
To enter, write a short review of any item on Powells.com that you think we should tell Daily Dose subscribers about.
Click here to read the complete and official Daily Dose contest rules.