Highland Hero by Cynthia Breeding

If Juliana Caldwell said the sky was blue, Rory MacGregor would tell her it was gray with a storm due any minute. No man gets under her skin more than the arrogantly handsome Scot. When she is abducted by a rival clan, Rory is the last person she expects or wants to call her hero.
Rory is the best tracker the MacGregors have, so when his brother’s sister-by-marriage goes missing, he’s ordered to find her. But binding himself to the fiery English redhead with an opinion about everything is not how he saw this rescue going. To save her from the clutches of the villainous Cameron laird’s son, though, he must declare them handfasted.
When their escape goes horribly awry, Juliana and Rory are forced to take the long way home. Surviving blizzard conditions, meddling clanspeople, and a near-fatal ambush on the trail, nothing compares to the unexpected and unlikely passion that ignites between the rugged Highlander and his English warrior princess.