This giveaway is intended to help authors gain new subscribers. You must have a mailing list to participate, and you must share the giveaway to your mailing list during the week of the promo, in addition to any social media platforms you use. Failure to do so will mean you won't be able to participate in future promos.
For those in KDP Select, make sure you are only offering a sample up to 10% (appropriately labelled as a sample) to avoid violating Amazon's T&Cs. The book only has to be free for the week of the promotion itself, but ideally your giveaway will run for the entire month (as the site gets traffic at all times). It only has to be free on Instafreebie.
Giveaway will be hosted here: http://sffbookbonanza.com/freebooks/
For more info, and future promos, see: https://www.facebook.com/groups/instafreebiepromos/
If you haven't already signed up to Instafreebie, do so here: https://www.instafreebie.com?invite_code=exGkmiVfUP
I am also running an accompanying "99c" promotion, where we can offer readers some additional bargain books. You can apply for that here: https://goo.gl/forms/atG1nxv7Rp3imnUF2
For more Sci-Fi and Fantasy promos, join the SFF Book Bonanza group: https://www.facebook.com/groups/sffpromos/