From the beloved author of “Tweet Cute” comes Emma Lord’s “You Have a Match,” a young adult novel of family, friendship, romance and sisterhood.

When high school senior Abby signs up for a DNA service, it’s mainly to give her friend and secret love interest, Leo, a nudge. After all, she knows who she is already: avid photographer, injury-prone tree climber, best friend to Leo and Connie.

But she didn’t know she has a sister. When the DNA service reveals Abby has a secret sister, shimmery-haired Instagram star Savannah Tully, it’s hard to believe they’re from the same planet, never mind the same parents — especially considering Savannah, queen of green smoothies, is only a year and a half older than Abby herself. The girls then meet and decide to attend camp together to piece together their family history.

Family secrets and self-exploration are at the heart of this novel. The developing bond between Savannah and Abby is the strongest and most compelling aspect of the book. Their growing closeness, and realization of their similarities despite their initial beliefs that they are too different to be friends, feels natural and thoughtfully rendered. This growing sisterhood is the focal point of the book, and it does not disappoint in any aspect.

The relationships between the two sets of parents in the book is messy and intriguing, and makes the suspense of waiting to find out what the cause of their split was worth it.

Lord’s descriptions of the Pacific Northwest are rich with sensory details. Abby and Leo’s romance is tender and sweet, and full of realistic misunderstandings.

The topic of adoption is a necessary one in young adult literature, but this portrait leaves much to be desired. Abby and Savannah are not the only characters with an adoption story — Leo was adopted from the Philippines by a white family at birth, but his story is given short shrift; his emotions about it are only mentioned periodically and go largely unaddressed by Abby.(SD-Agencies)