Description from Google Books:

This Christmas, could the cowboy from her past unlock the key to her future? When Landry King shows up at Four Corners Ranch with Lila, the teenage daughter no one ever knew he had, it sets the gossip mill churning. Landry's daughter has lost her adoptive parents and is in desperate need of a new family. So this Christmas, the untamed cowboy is finally getting the chance to become the father he could never have been when Lila was born. Even if it means dealing with his other biggest regret... Fia Sullivan hates Landry King. That's how it's always been. At least, that's how it's been since their dramatic teenage love affair ended in a way that shattered their hearts and left them with wounds that never healed. When Landry dredges up her most agonizing secret, Fia's devastated...and also overjoyed at the possibility of the new life they could have. But there's only so long she can be near Landry before their simmering desire reignites. Can they finally overcome their past pain to find new love--and new family--this Christmas?

Snippet from Google Books:

Four Corners Ranch Book 1: Unbridled Cowboy Book 2: Merry Christmas Cowboy Book 3: Cowboy Wild Book 4: The Rough Rider Book 5: The Holiday Heartbreaker Book 6: The Troublemaker