When Carole Hanson and her father travel to Minnesota to visit relatives, Carole has the perfect assignment to create a family tree. Ever since her mother died, Carole has been curious about that side of the family, especially about an ancestor who journeyed north along the Underground Railroad. Then Carole discovers a secret lurking in her family tree, and she begins to question where she's come from. Do bloodlines matter as much with people as they do with horses? Carole discovers the answer when a dangerous horseback ride threatens the life of one of her relatives.

Stevie, Carole, and Lisa are going back to the racetrack. They can't wait to help cool off their friend's sleek Thoroughbred racehorses by walking them. They'll even earn a little money for doing something they'd do for free! What could be better? Then the girls spot an official somewhere he shouldn't be, taking money from someone he shouldn't be talking to. Worse, the official sees the girls and knows they're on to him! Now the girls are in danger. More than one kind of race is going to be run--the Saddle Club girls must race for their lives!

Stevie's on the loose in New York City!Stevie Lake thinks she knows everything there is to know about getting along in New York City -- until she meets Regina Evans. Regina is the daughter of a New York friend of Stevie's mom. When Stevie and her mother visit the city, Mrs. Lake and Mrs. Evans catch up on old times -- while Regina introduces Stevie to her friends and their favorite hangouts.It's a lot of fun until an accident leaves Regina and Stevie in real danger. But just when things look worst, Stevie gets a chance to prove that a horse can always save the day -- even in New York City

Something's wrong at home and Lisa feels powerless every time her parents get angry at her or at each other. When CARL, the County Animal Rescue League, puts out an SOS for volunteers, Lisa knows she's found a place where she'll be appreciated. Before long, a stray horse named P.J. steals her heart. But just as things seem to be getting better, Lisa's parents deliver some news that will change her life forever.Stunned and upset, Lisa pulls away from everyone--even her friends--and devotes herself to caring for P.J. Stevie and Carole know that The Saddle Club can pull through anything, as long as they're together. But how can they help Lisa if she keeps shying away? When a fiery and famous show jumping team arrives at Pine Hollow and begins stirring up trouble, Carole and Stevie have to convince Lisa that they need her help--fast.

Emily has cerebral palsy, but she and her specially trained horse get around just fine. The Saddle Club girls make friends with Emily and even take her on her first trail ride.

Carole, Stevie, and Lisa, the three members of The Saddle Club, are totally devoted to horses--and to each other. But for Carole, it seems as if there's not much she can count on except riding and the friendship of The Saddle Club. Ever since her mother died, Carole has urged her dad to go out on dates. But now she's afraid that he's getting serious with a woman whom she isn't ready to think of as a stepmother. Meanwhile, Carole's getting the last thing she needs: unwanted attention from a boy. Scott will do anything--even muck out the stables--to get near her. And Stevie and Lisa aren't much help. They're busy modeling for a riding catalog--and finding out that modeling's not all it's cracked up to be!

Carole Hanson and her father are going camping, leaving her horse, Starlight, in her friends' care. But Stevie and Lisa get so busy with Starlight that they neglect their own less fortunate horses. And Carole and her father end up competing on their trip instead of having fun.

When a sick, abused horse is rescued and brought to Pine Hollow, every effort is made to save the horse's life, and Lisa, remembering the death of another abused horse, struggles to restore the horse's broken spirit.

Stevie, Carole, and Lisa are ecstatic that stable owner Max Regnery III is about to marry. They can't resist being part of things, so they plan a surprise "bridle" shower for the groom-to-be.Some serious business also needs their attention. The girls want stablehand Red to become a certified riding counselor. Maybe that way, he can be in charge of Pine Hollow Stables while Max is honeymooning and he'll get some respect from bossy Veronica diAngelo.It looks as if disaster will strike when both plans are marred by a mix-up that only The Saddle Club could cause!

Enthusiastic about a visit with her friend Dinah in Vermont, Stevie foolishly agrees to accompany Dinah on a ride up the dangerous Rocky Road trail--off-limits to all but the most experienced riders.

Carole Hansen's father has been sent away on a secret Marine Corps assignment. She worries about him constantly. When a fatal equine illness strikes a neighboring stable, The Saddle Club girls have 45 days to wonder, and worry about, whether the disease will reach Pine Hollow, and whether any of their horses could be in danger. Carole secretly decides to hide one horse from the affected stable and care for it herself.Meanwhile, Lisa Atwood is trying not to let her competitive impulses take over. But a classmate has challenged her for the position of valedictorian. Will Lisa's compulsion to always be the best turn the classroom into a nightmare? And Stevie has found a mysterious place in the woods. Is she on the trail of an Underground Railroad route? Or is she chasing after nothing?

It's almost Thanksgiving—so why don't any of the Pine Hollow riders feel thankful? Lisa Atwood is hoping to spend a relaxing Thanksgiving holiday in California. But it's hard to stop thinking about her complicated relationship with her boyfriend, Alex—not to mention the loss of her beloved horse Prancer. Then her brother arrives with a big surprise, throwing the family into turmoil and making Lisa question what she has to be grateful for. Back home, Stevie Lake is no longer grounded, but her friends aren't around to hang out with anyway. And Carole Hanson is just beginning her punishment for cheating on a test—no riding, no Pine Hollow, no socializing. The girls are going to have to search long and hard to find some gratitude this Thanksgiving.

Summer's over, and Carole, Stevie, and Lisa are hoping things will get back to normal—but is there even such thing as normal anymore?The start of the new school year is a reality check for best friends Carole Hansen, Stevie Lake, and Lisa Atwood. Stevie's boyfriend, Phil, is suddenly hanging out with Callie's brother, Scott, who still blames Stevie for the near-fatal car accident that injured his sister. Carole's new responsibilities at Pine Hollow Stables are threatening her relationships with her friends, and Lisa is having a hard time adjusting to being back in Willow Creek. Has she ruined her possibility for a career in the entertainment industry? And now Callie seems to be part of their special circle.Jealousy, betrayal, and an explosive secret will make this semester an unforgettable one. Forced to examine where their true loyalties lie, the girls start to realize that nothing stays the same—not even friendship.