Free from Sourcebooks:
His Every Need and a companion novella
To Be His by Terri Austin
My Highland Spy by Victoria Roberts
Sourcebooks also has several other $0.99 and $1.99 deals going. If you like animals, I've read
A New Leash on Love by Debbie Burns and enjoyed it. It's $1.99, and the second book
Sit, Stay, Love is also on sale for $1.99.