For new Oyster customers only, Gilt City offers a 2-Month Oyster eBook Membership
. That's a $20 savings and the best trial we've seen for this eBook library, which is accessible through Android, iOS, or web-enabled devices. Deal ends December 15; voucher must be redeemed by December 20.
Note: You'll need to cancel your subscription before the end of the two months; otherwise, it will continue at $9.95 per month.