Meet Rose and Ruby: sisters, best friends, confidantes, and conjoined twins. Since their birth, Rose and Ruby Darlen have been known simply as "the girls." They make friends, fall in love, have jobs, love their parents, and follow their dreams. But the Darlens are special. Now nearing their 30th birthday, they are history's oldest craniopagus twins, joined at the head by as pot the size of a bread plate.
When Rose, the bookish sister, sets out...

Nine-year-old twins Mitch and Amy quarrel and make up frequently during their year in fourth grade.

When Olivia Abbott moves to town, she's excited to join the cheerleading team and make new friends. Then she meets Ivy Vega. At first, Ivy, pale and dressed all in black, looks like Olivia's opposite. Then the girls look beyond the glittery pink blush and thick black eyeliner to discover they're identical-identical twins! Olivia and Ivy are brimming with plans to switch places and pull every twin trick in the book. But Olivia soon discovers that she...

Twins Maureen and Francine try to distinguish themselves for the first time by pursing separate interests at the beginning of the sixth grade.

When two lonely teenagers, one the son of a widower rabbi and the other the sister of an autistic twin, are drawn together by a tragic accident, they discover they have more in common than they guessed.

As their cross-country journey with their parents continues through the midwest, twins Coke and Pepsi, now thirteen, again face strange assassins at such places as the first McDonald's restaurant and Cedar Point amusement park.

Jake and Lily are twins and have always felt the same--like two halves of one person--but the year they turn eleven and Jake begins hanging out with Bump Stubbins, everything changes

Freddy is excited to hear that his cousins, twin sisters Kelly and Kasey, will be visiting for Christmas, even if the twins always find a way of getting Freddy into trouble.

It's a whole new ride from master of horror and bestselling author R.L. Stine--with a story so fiendish that it can't be contained to just one book! Jillian and Jackson freak out when they suddenly can read people's thoughts. But the trick turns to terror when the twins are stalked by a strange scientist who wants to know exactly what's on their minds. Will the twins ever lead normal lives again? Not in HorrorLand they won't. There are free meals,...

On a cross-country vacation with their parents, twins Coke and Pepsi, soon to be thirteen, fend off strange assassins as they try to come to terms with their being part of a top-secret government organization known as The Genius Files.