The free shipping offer (for U.S. buyers) still applies so you will receive both a free book and free shipping.
To qualify for free shipping all purchases must be paid for in a single transaction. This is a change made necessary by eBay's decision to impose a non-refundable surcharge on shipping fees beginning in April 2011.
In April eBay will start to keep 9% of the shipping portion of each payment. This requires sellers to increase either their shipping fees or the price of their merchandise.
I have offered the same basic shipping for more than 5 years: $3.50 postage for 1 to 4 books and free shipping for 5 or more books. As a result of the eBay surcharge and yet another increase from the US Postal Service I am forced to increase basic postage to $3.90 per package. This will still apply for packages containing 1 to 4 books and I will still offer free shipping for 5 or more books.
eBay encourages (and pressures) sellers to add the postage to the price of each item and then say that shipping is “free.” If I did this it would mean that my customers pay $3.90 postage for every book rather than a single $3.90 (or less) shipping fee, so I will not be doing that.
The new eBay fee will also force me to add a surcharge to the prices of Priority Mail and international postage. In the past I have offered these at cost, simply passing along the exact amount of postage charged by the Post Office. I will now have to add 9% to the postage in order to pay eBay.
One last point: eBay has made the new fee non-refundable to sellers, which makes it necessary that multiple-book purchases be paid for in a single transaction to receive free or discounted shipping. eBay will keep their cut even if a seller refunds the postage to a customer.