Tiny mouse Marco Polo is almost never chosen to leave the library, but when a boy about to attend his first sleepover needs a friend to smuggle along, the great mouse explorer's day has come.

Eleven-year-old Ava Andrews has a Technicolor interior with a gray shell. On the inside, she bubbles with ideas and plans. On the outside, everyone except her best friend, Zelia, thinks she doesn't talk or, worse, is stuck-up. What nobody knows is that Ava has invisible disabilities: anxiety and a heart condition.Ava hopes middle school will be a fresh start, but when Zelia moves across the country and Ava's Nana Linda pushes her to speak up about...

As they prepare for a short separation, Mama Bear and Little Bear find a way to reassure each other while they are apart.

Because of a recent string of embarrassing behavior, Kitty's cat license has been revoked and she must take a test to get it back so she can still be a cat.

A talking tiger approaches a family during their annual end-of-summer camping trip and is befriended by the youngest, a boy who does not feel ready for first grade.

A small boy wonders what first grade will be like, but is not sure that he wants to find out.

Little Yellow Bus is nervous on his first day of picking up kids, but as he drives along his route he notices that many of the children are also anxious and he begins to gain confidence.

Moving to the Philippines with his zoologist mother, twelve-year-old Pablo struggles with anxiety while his mother fosters an orphaned child with a facial anomaly.

"A child worries about what it will be like while his papa is away, until papa is home"--

"Halfway through the fifth grade, Penny Lowry is discovering that things are actually going . . . okay! With her friends Maria, Kristian, and Rocco on her side, and her lovable dog Cosmo, she can make it through anything. And when her anxiety comes back, there's always her doodling, or talking to Mrs. Hines, the Feelings Teacher. But big change is around the corner: Penny's family is moving to a new house, her mom is about to give birth to twins,...