What links all of these subjects? Escape from Stalog Luft III The tunnel under the Berlin Wall Hidden worlds underground Simple-theyÿre all Extreme! Prison Break! is packed full of fascinating cases of daring prison breakouts, elaborate escape tunnels and the extraordinary cavers who spend weeks in dark, freezing caves 6,500 feet underground. Extreme is an action-packed series that brings together incredible tales and secret facts about the most radical things you really want to know-such as how to avoid a shark, survive a snowstorm, or spot the world's most poisonous snake! Discover the fascinating stories behind how things work and why they happen. Book jacket.