Here are the actual Harlequin ones I saw with a quick browse. I did not include the More Than Words stories, as I think they were mentioned as free earlier in the thread. Or the 36 Hours part I "books".
Destined for the Maverick by Allison Leigh - 99¢ currently free at Amazon
Grave Danger by Heather Graham (originally in Love Is Murder anthology)
There looked to be some free Spanish versions, too.