“Two cardboard boxes, big enough to sit in, hide inside.”

Birt and Etho know that all you need to have fun is this: a friend and a big cardboard box. The friends spend their days on Sudden Hill imagining grand adventures with the help of their boxes. Their “two-by-two rhythm” is unparalleled. That is, until Shu shows up on Sudden Hill one day, toting his very own cardboard box.

The dynamic duo becomes a troubled trio when Birt, feeling alienated, smashes his box to pieces and stops going to the hill. Will Etho and Shu go on adventures without Birt, or will Birt come to see that friends and adventures are even better when shared?

The whimsy of childhood play is captured spectacularly in charming painted illustrations, and a “the more the merrier” messages shines. Recommended for all readers in preschool through approximately third grade, especially those who may be having a difficult time sharing a best friend.