Books about War

A young boy sitting on a park bench, reaching out toward an orange striped cat nearby. Autumn leaves are scattered on the ground. Behind the boy, there is a window and a sign that reads 'A Cat Called Waverly' by Debi Gliori. The left side has a decorative blue border with fall leaves.
Children looking at a large colorful butterfly with orange, pink, purple, and blue wings on a white background.
Cover of the book titled "The Day We Sang" by Nicola Davies, illustrated by Rebecca Cobb, showing a girl dancing on a plain background with scattered paper and a chair with papers hanging from it.