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.

When they are separated for the first time since birth, Iris and Lark struggle with insecurities over their individual identities at the same time things begin to go missing around town.

Fifteen-year-old twins Sophie and Josh Newman continue their magical training in Paris with Nicholas Flamel, Scatty, and the Comte de Sant Germaine, pursued by Doctor Dee and the immortal Niccolo Machiavelli.

Mary Poppins comes back on the end of a kite string, stays with the Banks family for a while, and then disappears on a merry-go-round horse.

Tandy Angel is, along with her brothers, a suspect in their parents' murder but having grown up under Malcolm and Maud Angel's perfectionist demands, Tandy decides she must clear the family name no matter what.

While his father works two jobs, seventh-grader Efrén Nava must take care of his twin siblings, kindergartners Max and Mia, after their mother is deported to Mexico. Includes glossary of Spanish words.

When their two worlds collide in seventh grade, fraternal twins and opposites Owen and Russell find themselves in direct competition at school, on the court, and at home.

While working at pleasant but mundane summer jobs in San Francisco, fifteen-year-old twins, Sophie and Josh, suddenly find themselves caught up in the deadly, centuries-old struggle between rival alchemists, Nicholas Flamel and John Dee, over the possession of an ancient and powerful book holding the secret formulas for alchemy and everlasting life.

"The Kidd children--including twelve-year-old twins Rebecca and Bickford--follow mysterious clues that take them from China to Germany, in the hopes of finding their missing father and the treasure that will finally free their kidnapped mother"--

After barely escaping from the compound where Eli's dad kept his family for six years, Eli and his family are are learning to acclimate to "normal" life.