If you like books about horses...
Thank you for requesting a Book Match. I have not read the Heartland series, but here are some other inspiring horse stories you may enjoy:
Colt by Nancy Springer.
Summary: A young boy with a crippling disease learns, through a horseback riding program, to overcome his own anxieties and to help others in dealing with their own problems.
Megan's mare by Lynn Hall.
Summary: Eleven-year-old Megan, daughter of a Yorkshire horse trainer, finding she has a special bond with the beautiful problem mare Berry, determines to help her overcome her fear of wooden bridges.
Misty of Chincoteague by Marguerite Henry
The determination of two kids to win a Chincoteague pony is greatly increased when the Phantom and her colt are among those rounded up for the yearly auction.
And here are some other inspiring animal books:
Animals Who Have Won Our Hearts by Jean Craighead George
Summary: A collection of stories about animals who became beloved and famous, including Balto the sled dog, who found his way through a blinding snowstorm, and Koko the gorilla, who learned sign language.
Rascal, a Memoir of a Better Era by North, Sterling, 1906-
Summary: Heartfelt, ture stories of a boy's pet raccoon, Rascal.