For new Scribd customers only, Groupon offers a Scribd 3-Month Trial Subscription for free. That's tied with last week's mention and a savings of $30 for a service that's already designed to save you money. Scribd provides monthly access to millions of ebooks, audiobooks, digital magazines, and more — all for less than the price of a paperback. The subscription includes three ebooks and one audiobook each month and unlimited access to sheet music, documents, and magazines such as People, Bloomberg Businessweek, and The Atlantic. Deal ends January 21 at 5 am ET.

Be sure to cancel your membership before your trial ends; otherwise, you'll be billed $9.99 per month. Note that Groupon lists this service as normally $8.99 per month, but the Scribd website notes $9.99 per month.