Goliath
Goliath is described in the biblical Book of Samuel as a Philistine giant defeated by the young David in single combat. The story signified Saul's unfitness to rule, as Saul himself should have fought for the Kingdom of Israel.
David and Goliath (book)
However, Lucy Kellaway in the "Financial Times" wrote, ""David and Goliath" is Gladwell’s most enjoyable book so far. It is a feel-good extravaganza, nourishing both heart and mind… Gladwell is a master at marching us off in one direction, only to end up taking us somewhere else instead—somewhere better."