When a new boy wants to join in their play, will these two friends find room for three? Find out in children's book author Linda Sarah's Big Friends, illustrated by Benji Davies

Birt and Etho are best friends. Together they play outside in big cardboard boxes. Sometimes they're kings, soldiers, astronauts. Sometimes they're pirates sailing wild seas and skies. But always, always they're Big friends. Then one day a new boy arrives, and he wants to join them. Can two become three?