Samantha and the Cowboy — Lorraine Heath

SAMANTHA
When she manages to get herself hired for the cattle drive, all of Samantha's prayers seem to be answered. The hundred dollars she'll earn will pull her family's Texas farm out of ruin and pay off their debts. But keeping the cowhands fooled that she's a boy becomes harder than she'd expected where one cowboy in particular is concerned.

THE COWBOY
Matthew Hart wants two things: to forget the tragedies he witnessed on the front lines of the War Between the States, and to reclaim his cowboy life. The last thing he wants is the responsibility of a tagalong youngster on the cattle drive. His closed mind and hardened heart are territory best left unexplored, until a fateful moment turns his world upside down.

Matt discovers what and who "Sam" really is, and he is furious. But soon a stronger emotion takes hold, and bound by Samantha's secret, Matt is torn between revealing her identity and his own sudden and frightening love for her.