The Luck of Texas McCoy carries a strong social message to the reader. No matter how desperate and down on his luck a person may be, he has worthwhile qualities that give him dignity and purpose. Poor abandoned Sandy becomes a better caretaker and confidante to Texas than Texas's own mother ever was. Frightened little TJ has wonderful rapport with all living creatures, and Texas herself shows courage and determination in trying to save her run-down ranch.

As Texas learns, prejudices can get in the way of really seeing people. In carrying on her grandfather's senseless grudge, Texas falsely accuses, and consistently rebuffs Pete and his warm and generous Mexican neighbor family.

Only when she is ready to admit her own errors and to open her mind, does she see them for the friends they are and can be.