Ella Wilhelmina is a spirited, curious girl with a plan for everything—especially solving problems. Tackling challenges head-on, Ella is certain she can out-think, out-plan, and out-wiggle any problem. But along the way, she discovers something even better than a solution: the people who love her, who help her see the world—and its trickiest dilemmas—in a whole new light.

In The Big Conundrum funny expressions have Ella puzzled all day . . . until bedtime when her parents tell her it’s time to fall asleep. There’s just one problem: the last time Ella fell, she broke her arm. When all her...