After her brother Jared dies, ten-year-old Annie worries about the hidden dangers of everything, from bug bites to bicycle riding, until she is befriended by a new neighbor who is grieving her own loss.

"Alex Allen, like lots of children, sometimes worries about things--like dancing badly or getting an answer wrong in class. But unlike lots of children, every time he worries a real-life llama appears! And the more Alex worries, the bigger Llama grows...which starts getting him into all sorts of trouble. Will Alex ever learn how to control his worries and get rid of this pesky llama?"--

When Lila, a worrier, moves to a new town, the what ifs only grow, and she feels alone and invisible until her teacher finds a creative and kind way to make Lila feel welcome and open to new experiences, a lesson that will stay with her long after second grade.