|aFirst published: London : Simon & Schuster Childrens Books, 2014 under the title On Sudden Hill.
|aBest friends Etho and Birt love going up Sudden Hill and sitting in simple cardboard boxes imagining they are kings, soldiers, astronauts, or pirates until Shu asks to join them, and their "two-by-two rhythm" is disturbed.
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?