After she betrays her identical twin, Jessica Wakefield longs for forgiveness, but Elizabeth moves from Sweet Valley, California, to New York City and searches for the perfect revenge.

Gaia--a CIA agent's teenage daughter searching for the reason she was born literally fearless--once again rejects her first real love, Ed, in order to protect him from her life; meanwhile, Gaia's classmate Heather begins acting very strangely.

"Gaia Moore is brilliant and beautiful. She's trained in three kinds of martial arts, has a reflux speed that's off the charts, and can break codes in four languages. She's also missing the fear gene. All Gaia wants is to be like everyone else. Instead, she's left wondering about her past, her missing family--and the unavailable boy she's falling for. But everything changes when she learns that someone is hunting her down for her special skills, and...

The second grade class gets a new substitute teacher, Mr. Marshall, who is very strict. The Wakefield twins see Mr. Marshall getting into a police car. Could he be a dangerous criminal?

In her struggle to protect her best friend from getting hurt, Elizabeth finds herself torn between Amy, who is determined to join the Unicorn Club's cheering squad, and her twin sister Jessica, who is one of the Unicorns who do not want Amy on the team.

Jessica and Elizabeth take home a stray cat even though Mr. Wakefield and Steven have allergies.

Jessica is thrilled when she wins the second grade spelling bee, but now she has to represent the whole school at the district spelling bee, and she is scared.

When the new sixth grade teacher gives all the good assignments to the boys and treats the girls badly, the girls, led by Elizabeth and Jessica, come up with a plan to theach the teacher and the boys a lesson.

Jessica hands in a story which isn't hers in order to be chosen to help her favorite author autograph books.