On June 6, 1930, engineer Otis Barton and explorer Will Beebe dove into the ocean inside a hollow metal ball of their own invention called the Bathysphere.

They knew dozens of things might go wrong. A tiny leak could shoot pressurized water straight through the men like bullets! A single spark could cause their oxygen tanks to explode! No one had ever dived lower than a few hundred feet…and come back. But Otis and Will were determined to become the first people to see what the deep ocean looks like.This suspenseful story will put you right in the middle of the spine-tingling, record-setting journey down, down into the deep. 

Backmatter includes historical photos, author’s note, illustrator’s note, expert’s note and sources.