Paper products revolutionized the 21st century by increasing literacy, facilitating communication, and inspiring Congress to pass the New Deal after a game of M.A.S.H. Revel in revolutionary stationery with today's Groupon: for $10, you get $20 worth of books, calendars, and cards from Tide-mark Press, an online store.

Tide-mark Press stocks a slew of decorative paper products and gifts that encompass a range of tastes and interests. Books line the e-shelves and range from topics on art and landscape to food and wine, such as Yogurt ($19.95), a treatise on adding enzymes to milk. Calendars keep time travelers in check and feature themes such as Mark Twain ($13.95) and Yoga ($13.95). Themed greeting cards and note cards give people a reason to lean against mailboxes brandishing letter openers. Holiday cards, such as Oscar Fabres' retro designs from the collection of the New York Historical Society, remind Tide-mark's shoppers that it's never too late to send season's greetings.