"Rio has always dreamed of leaving the underwater city of Atlantia for life in the Above; however, when her twin sister, Bay, makes an unexpected decision, Rio is left stranded below where she must find a way to unlock the secrets of the siren voice she has long hidden and save Atlantia from destruction"--

Laurie thinks she is being spied on and is then dropped by several friends as a result of things they say she was seen doing but which she does not recall.

In Changelings, bestselling authors Anne McCaffrey and Elizabeth Ann Scarborough returned to the sentient planet Petaybee with a story of growth and transformation in the face of deadly new threats. The telepathic, shapeshifting twins Murel and Ronan found that Petaybee had plans for them as well. Now those plans begin to bear fruit with fresh possibilities . . . and dangers.

Now that Petaybee is forming a new equatorial island,...

Despite problems at home, sixteen-year-old conjoined twins Tippi and Grace are loving going to school for the first time and making real friends when they learn that a cardiac problem will force them to have separation surgery, which they have never before considered.

After seeing a girl who looks just like herself in a violent video, Emma, who lives with a foster family, begins a search to find out what happened to the girl.

"As the exiled Queen of Faerie, Jude must travel back to Elfhame to help her twin sister, Taryn, and uncover how to break a dark curse threatening the whole Faerie world."--

"Melody and Harmony are without a doubt two of the most powerful pregnant teens on the planet, and there's only one thing they could do that would make them more famous than they already are: tell the truth"--

Leaving Petaybee to help rescue a family friend, selkie twins Ronan and Murel are imprisoned by the Company, which wants them as workers, and an unscrupulous scientist, who hopes to study their unusual shape-changing talent.

In Rainbow Rowell's Fangirl, Cath is a Simon Snow fan. Okay, the whole world is a Simon Snow fan, but for Cath, being a fan is her life-and she's really good at it. She and her twin sister, Wren, ensconced themselves in the Simon Snow series when they were just kids; it's what got them through their mother leaving. Reading. Rereading. Hanging out in Simon Snow forums, writing Simon Snow fan fiction, dressing up like the characters for every movie...