Amazon is now offering free shipping on orders over $25. Called Free Super Saver Shipping, the program originally offered free shipping on orders over $99. The company lowered the threshold to $49 in June, and yesterday announced the new lowered threshold.

"With Amazon.com's 30 percent off books over $15 and now Free Super Saver Shipping on orders over $25, there may be reasons to shop in the physical world, but price is not one of them," said Jeff Bezos, Amazon.com founder and CEO.

In July 2001, Amazon lowered book prices to 30 percent off books over $20, and in January introduced its Free Super Saver Shipping option on orders over $99. In April, Amazon.com extended the 30 percent discount to books over $15.

Free Super Saver Shipping is three to five days slower than standard shipping and is free on qualifying orders over $25. For more details, visit http://www.amazon.com/supersavershipping.