Third-grader Clementine tries to adjust to the news that her perfect family of four is adding a new brother or sister.

Tiring of a newborn sibling who demands all her busy mother's attention, Ruby gets bored with endless solo activities and imagines creative ways to make her baby brother disappear, adventures that become so much fun that she decides to tag along.

Henry and Eve are going through a phase of fighting with each other all the time, and their battle quickly escalates from arguing over a toy to leaving a path of destruction across the United States and beyond.

When Jade does well in a track meet, her entire family is excited except Justin, who later confesses to their older brother Jordan that he wishes he were good at something for which people would cheer.

Toby is eager to be considered "big" and do things on his own, but being a big boy is not quite as exciting as Toby thought it would be when he realizes it comes at the expense of mommy's attention, now devoted to his baby sister.

"A sibling rivalry to fuel your worst nightmares. The dysfunctional triplet gods of Sleep, Dreams and Nightmares are kept separate by the deadly Gates of Horn and Ivory. Only one fact keeps them tightly bound: each of them is a suspect in their mother's murder. Their knife-edge feud worsens when a mortal enters the world with astounding abilities that threaten to change the game for them all. In this thrilling young adult fantasy, Ashaye Brown brings...

The Ice Princess's magic mirror is broken, one piece is missing, and without it the Enchanted Kingdom is locked in a terrible, unseasonable, heat wave (even the palace is melting); two children, Kara and Zed, are determined to help, but first they must figure out whether the break is the result of the sibling rivalry between the Ice Princess and her sister the Sun Princess -- or did the monkey do it?

"Iris loves to push the elevator buttons in her apartment building, but when it's time to share the fun with a new member of the family, she's pretty put out. That is, until the sudden appearance of a mysterious new button opens up entire realms of possibility, places where she can escape and explore on her own. But when she's forced to choose between going at it alone or letting her little brother tag along, Iris finds that sharing a discovery with...

Twelve-year-old Max, who has an extreme overbite, must navigate sibling rivalry and middle school bullies. Max Plink's life is complicated. Her parents aren't getting along. The school bullies are relentless, and her own sister is the cruelest of them. Worst of all, her mouth is a mess. With a mismatched puzzle of a jaw, Max has a Class II malocclusion, otherwise known as a severe overbite. She already has braces, which means she lives on Advil and...