A number of contemporary romances from Mills & Boon Modern (in the US/Canada these were mostly Harlequin Presents) are free from Amazon.de and appear to be so on US Amazon.com as well. (I don't have the time to check all of them right now. And mind you, I don't see US Amazon pages the way you do, so this might be part of some special program.)
Sandra Marton,
Not For Sale US DE
Maisey Yates,
Marriage Made on Paper US DE
Kate Walker,
The Proud Wife US DE
Sharon Kendrick,
Too Proud to Be Bought US DE
Carole Mortimer,
Taming the Last St Claire US DE
Trish Morey,
The Heir From Nowhere US DE
Miranda Lee,
Not a Marrying Man US DE
Robyn Donald,
The Far Side of Paradise US DE
Jane Porter,
A Dark Sicilian Secret US DE
Cathy Williams,
In Want of a Wife? US DE
Penny Jordan,
A Stormy Spanish Summer US DE
There are more, but I must be off to take some tea ... will get back to this later!