“Double trouble finds comic relief.” —Kirkus Reviews From beloved author-illustrator Rosemary Wells comes a brand-new story about the inimitable brother and sister Max and Ruby. Max and Ruby’s family is expanding and soon enough nobody will be getting any sleep! Max and Ruby are in for a big surprise. Mama has a baby in her tummy and soon the family will be bigger and better. Luckily Ruby knows all about babies: what they eat, how to bathe them, and where they come from. Ruby tells Max all about it. Soon no one will be getting any sleep, but Max has an idea on how to help! Max and Ruby have their own TV show on Nick Jr.!

Stephanie's in charge of planning the sixth graders' carnival, but she has to baby-sit the twins at the same time. She thinks she can handle it -- until she almost loses one of the twins while baby-sitting. Then the day of the carnival is nearly a disaster.

Kate DiCamillo meets Lemony Snicket in this darkly comic novel about two sisters who learn they are each others' most important friend! Imagine two twin sisters, Arabella and Henrietta--nearly identical yet with nothing in common. They're the best of friends . . . until one day they aren't. Plain and quiet Henrietta has a secret plan to settle the score, and she does something outrageous and she can't take it back. When the deed is discovered, Henrietta is sent to live with her eccentric great-aunt! Suddenly life with pretty, popular Arabella doesn't seem so awful. And, though she's been grievously wronged, Arabella longs for her sister, too. So she hatches a plan of her own and embarks on an unexpected journey to reunite with her other half.

From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! When Tammy beats her twin, Terry, in the school readathon, the sisters who were once so identical begin to demonstrate their differences and get concerned . . . until they are visited by another twin in their lives -- Grandma.

The Trouble with Twin Studies questions popular genetic explanations of human behavioral differences based upon the existing body of twin research. Psychologist Jay Joseph outlines the fallacies of twin studies in the context of the ongoing decades-long failure to discover genes for human behavioral differences, including IQ, personality, and the major psychiatric disorders. This volume critically examines twin research, with a special emphasis on reared-apart twin studies, and incorporates new and updated perspectives, analyses, arguments, and evidence.

A DOSE OF DOUBLE TROUBLE! Whether it’s eight seconds on a bronc or the thrill of his motorcycle, bull rider Brock McNeal lives for the adrenaline high. A family of his own is out of the question. So why is he irresistibly attracted to widowed doctor Cassie Stanford? Because for all her feistiness and mess of dark curls, Cassie comes with a lot of strings. Including identical twin four-year-old sons! Yet as Brock helps Cassie fix up her run-down ranch, the sparks between them ignite. They both know Cassie could never get serious about a cowboy who chases danger. But when love takes on a life of its own, Brock faces the biggest risk ever: choosing between his rodeo life…and his heart.

In London with their family, telepathic twelve-year-old twins Liberty and July receive strange emanations from an early residence of Arthur Conan Doyle and discover a literary ghost.

Lil and Phil can't get along until they are split up and miss each other, and Chuckie and Tommy must find a way to reunite them.

Are Big Bird's eyes playing tricks on him? He keeps seeing the same boy again and again on Sesame Street! This story about identical twins shows children that even though people may look alike, everyone is unique.

Dallas Buckhorn refuses to believe it. His angelic girls wreaking havoc? Never! But their teacher, Josie Griffin, insists on making him feel like the worst father on the planet. He only wants his daughters to be happy. How can that be wrong? Josie knows the Buckhorn twins aren't bad—they're just spoiled by their overindulgent, and ruggedly handsome, cowboy daddy. But she also has a job to do, and she can't do it when the twins are out of control in her classroom. Josie might be hard on Dallas…because he seems oblivious to how lucky he is to have his girls. Her own tragedy haunts her, but the more she spends time with the Buckhorns the more she imagines herself in their family picture. But that means saying goodbye to her past, and she's not sure she can do that….