This is a lot of 2 softcover books in the Phantom Stallion series by Terri Farley:
#1 The Wild One
#2 Mustang Moon
Condition: used, both are in very good condition with minimal edgewear and clean, tight pages.
Synopsis: #1 It’s been two years since Sam’s horse, Blackie, threw her in a near-fatal accident. She’s been separated from her family, her ranch, and the wild mustangs she loves. Now she’s home again, but her beloved horse has been missing since that fateful day. Then one night, a mustang comes to Sam. Is it Blackie, grown up and gone wild? Or is it the legendary stallion known as the Phantom” Or could it be both?
Synopsis #2 Sam and the mysterious, powerful mustang known as the Phantom have become friends, and she’s determined to defend his freedom on the open range. But the mustang has been accused of stealing tame mares from local ranchers. Sam knows the Phantom isn’t responsible, and she races to prove his innocence. Then a local rancher offers a reward to anyone who can capture the wild stallion. A price on his head means it’s just not his freedon Sam’s fighting for, it’s his life.