Holly Meredith is turning thirteen on Valentine's Day, and she can't wait! Maybe this will be the year to visit her dad in California, where he moved when her parents divorced several years ago. Since then, Holly has grown very close to her mom and little sister, and she has a best friend she can share everything with and tell everything to…well, almost everything. Holly and her best friend, Andie, were having a great seventh-grade year. But now a new boy in their class has them fighting over him—and this is one thing the girls can't share! According to the Loyalty Papers they created a few years ago, one of the girls has to back off. Should Holly forget about Jared to save her friendship with Andie? Or should she force Andie to stay away? When Holly's secret plan backfires, she discovers the true meaning of friendship—and learns the miracle of forgiveness.

Holly Meredith has the perfect summer planned. Her dad has asked her to stay with him in California for a few weeks, and Holly is super excited. She's looking forward to getting to know her dad better, and she knows this is the perfect opportunity to witness to him about God's love. Besides, this will be a great way to try to forget about Jared, her two-timing first crush. The problem is that no one wants Holly to go-not her mom or her younger sister or her best friend, Andie. Holly's summer dreams seem to be disappearing, and she's really bummed that she'll be stuck in boring Dressel Hills for another summer, putting up with her mom's bossy new boyfriend and his constantly sick kid. But when a family emergency sends Holly's mom to Denver, Holly feels worse than ever. What will become of the summer now?

Book 3 of Holly's Heart. Too many little white lies can create one big jam. Holly and her best friend, Andie, are having a race to see who can collect the most pen pals by Labor Day. The contest was exciting and fun at first, but Holly eventually finds herself in a bit of a mess when she starts writing to a male pen pal. College-aged Lucas Leigh, Holly's newest and top-secret pen pal and the nephew of her favorite author, thinks Holly is a much older, published writer. Holly is thrilled when Lucas suggests they read each other's manuscripts, but her seemingly innocent deception backfires when Lucas asks to meet Holly in Now Holly must give up the opportunity to meet her favorite author…or face the consequences of telling lies.

Book 4 of Holly’s Heart. Holly’s determined to make this wedding unforgettable! Holly’s mother is getting married, and Holly can’t wait to help plan the perfect wedding—but their ideas couldn’t be more different. When Holly’s mom starts making “boring” plans, Holly pleads to have control over one finding the perfect bridesmaid dress. How can you go wrong with a purple satin gown? And when Goofey, the family cat, is led down the aisle on a leash, Holly realizes this wedding is turning into a hilarious—and embarrassing—situation! Meanwhile, Holly has had it with preachy Danny Myers, her first “boyfriend.” So when Holly’s first crush, Jared Wilkins, reveals his true feelings for her, how can she believe he’s stopped his two-timing ways? With a little bit of time, perhaps a creative test will reveal Jared’s reliability.

Holly is spending Christmas with her dad—her first time away from her mom and their new family. When Holly's stepmom starts to drive her crazy, Holly realizes she needs to learn how to trust God and trust people.

Holly's best friend has a pen pal visiting from Austria. And to make things worse, she has to give up her precious cat. Holly needs a lesson in overcoming jealousy—before she ruins all her friendships!

Book 7 of Holly's Heart. Holly's stepfather has gotten a new job—in Denver! Holly has only two weeks to say good-bye to her friends in Dressel Hills. Will she keep a long-distance relationship with Jared? A day of packing leaves Holly devastated after uncovering the truth about her parents' divorce, but Holly realizes the importance of family after a snowbound night at school.

Holly has a crush on the new student drama teacher; are the feelings mutual? Is that why she got the lead in the school musical? With so many changes taking place for her, she doesn't know what to believe anymore. But with some great advice from a good friend, Holly remembers that when God closes a door, He opens a window.

Book 9 of HOLLY'S HEART. Holly and her friends are excited about summer camp. What could be better than a week away having fun? But when a little disrespect from the boys gets them the silent treatment from the girls, they all learn a lesson they'll never forget. Includes two recipes tweens will enjoy making and eating!

Book 10 of HOLLY'S HEART. Holly and Andie are going to California, but when Andie flips for an older boy, Holly wonders if she should tell Andie’s mom. And why is Holly’s dad acting so weird? Stretching the truth proves more than Holly can handle. Can God help her to set things right?

Book 11 of Holly’s Heart. When Holly begins high school, she’s not sure she can survive the initiations. But her best friend, Andie, adjusts quickly and begins a campaign for class president—leaving Holly behind. Holly discovers that help can come from the most unexpected sources.

Book 12 of Holly's Heart. Holly's been receiving secret-admirer mail she doesn't like. To make things more complicated, her 'F' in algebra leads to tutoring by her annoying little stepbrother! Even with the flattering attention of Sean Hamilton, Holly is frustrated…until a surprise shows her the secret to getting past her personal weaknesses.

Book 13 of Holly’s Heart. Holly just found out that her mother is expecting a baby! Everyone in the family is excited—except for Holly. There’s no room in their tiny house for another person. Should she move to California to live with her dad, or can Holly make room in her heart for a new baby brother or sister?

Holly is devastated to find out that her mom's baby is due when Holly's supposed to be on choir tour. Holly doesn't want to miss out on the fun with her friends, but she also can't leave her mom now, especially with Stan refusing to help with the new baby. How can Holly be in two places at once?

Thirteen-year-old Holly is dealing with the major concerns of every preteen and teenage girl: boys, family, and school. But with the help of her friends and her faith in God, Holly is able to survive her first boyfriend and her first breakup, a crush on her student teacher, and a new baby sister "invading" her house. Volume One includes Best Friend, Worst Enemy; Secret Summer Dreams; Sealed With a Kiss; The Trouble With Weddings; and California Crazy.