His Fifth Kiss by Liz Isaacson

They once had a few summers together. Now, Michael Hammond is back in town after a devastating injury overseas. He’s looking to reset and recover…not to fall in love.
Of course Mike looks for and hopes Gertrude Whettstein will be on the farm. She was so much of Ivory Peaks and so important to him when they were teens. He’d once thought they’d take their summer puppy love into adulthood, but life got in the way. Gerty and Mike haven’t seen each other for almost fourteen years…until she walks up behind him while he’s admiring her horses.
Gerty returns to the safety and security of Pony Power, the Hammond Family Farm, her family, and horses after a devastating split from her fiancé. She’s been north and south across the country, working with horses and competing in the rodeo, but Ivory Peaks is where she goes when she needs to heal.
Face-to-face with Mike, the boy she’d once relied on and liked so much, she wonders if they’ve been brought back together after all this time for a special purpose. Her wounds are all internal, while Mike’s are on the outside, but the spark between them as adults is as hot as ever.
Can Gerty and Mike make their second chance romance into a happily-ever-after?