Sweet Valley Twins (also known as Sweet Valley Twins and Friends) was the 1st spin-off to originate from Sweet Valley High, and was created by Francine Pascal and written by Jamie Suzanne. Published by Bantam Books on 1 July 1986, the series starts with the twins wanting to differ from each other. They begin to dress differently; Elizabeth moves into her own room and starts up a sixth-grade newspaper; and Jessica starts wearing make-up and becomes a member of the Unicorn Club.

Main characters

Elizabeth Wakefield is the elder twin, born four minutes before Jessica. She enjoys reading (her favorite books are Amanda Howard mysteries) and writing, and hopes to become a journalist someday. She likes to concentrate on her school work and spend time with her friends. She writes for the sixth-grade newspaper, The Sixers, which she helped found. Elizabeth always helps Jessica out of her problems. She's often referred to as the reliable, more serious twin. Todd Wilkins is her constant love interest throughout the series. Jessica Wakefield is the complete opposite of her twin; she loves gossip, boys, and fashion. She prefers to hang out with the other members of the Unicorn Club, a club consisting of the prettiest and most popular girls at their school. She is a member of the Boosters, the school's cheerleading squad, and often gets into trouble. She usually ends up concocting ridiculous schemes, and drags Elizabeth along with her. Aaron Dallas is her constant love interest throughout the series. She also likes Johnny Buck cassettes. Jessica and Elizabeth are equally popular. They are described as having long golden hair, blue-green eyes, a tan, and a dimple on the left cheek.

Recurring characters

Books

Super Editions

Super Chillers

These books were a series which saw the twins encountering supernatural things such as ghosts and curses.

Magna Editions

The Unicorn Club

This series traces the members of the Unicorn Club in the Wakefields' seventh grade. Each book is from the point of view of a different Unicorn. In this series, after Kimberly Haver, a snobby Unicorn, moves to Atlanta (and later moves back) and Janet Howell, the former president, leaves for high school, the Unicorn club changes. Elizabeth, Maria, and a sixth grader named Evie become Unicorns too, and they all volunteer at the day care center. When Kimberly moves back, things change, and Elizabeth, Maria, Evie and Mary leave the Unicorns and start a new club called the Angels.

Team Sweet Valley

This short series lasted for two books and follows the Wakefield twins in their team sport endeavours. The first book was published in July 1996 with the "Team Sweet Valley" logo, but was republished in November 1996 as "a special Team Sweet Valley edition" that was part of Sweet Valley Twins.