Go to this signup page for Culinary Canary (a recipe book publisher) to get notifications, by email, of free ebooks that they offer from time to time. The offers are good for a 5-day period. The books are in the Amazon/mobi format.
http://facebook.us7.list-manage2.com...&id=969808a6f8
They have published a huge number of ebooks. I don't know if the free ebooks come from their present selection, from their newly published ones, or a mixture of the two. You might want to take a look at this list of their books that are sold by Amazon to get some idea of the quality (from ratings and reviews, mainly) and variety of their books.
http://www.amazon.com/s/ref=nb_sb_no...ulinary+canary.