Prologue: The journey begins -- Expedition I: Sea legs. Setting sail ; The ocean wave ... ; ... Or particle? ; Traveling in the quantum field -- Expedition II: Atom land. Atoms ; Going subatomic: the electron. Nuclear options. The source of chemistry -- Expedition III: The Isle of Leptons, and roads onward. Electromagnetism ; Invariance and relativity ; The good ship Dirac ; Spin and antimatter ; The electron's overweight siblings ; Rest stop -- Gravity: a distant diversion. The weakest force ; Planes and merry-go-rounds ; Different, yet somehow, the same ; Ripples in the space-time continuum -- Expedition IV: Great train journeys. Protons, neutrons, and the nucleus ; Hadrons ; Quarks and the strong force ; Life beyond the bridge ; Flavors and generations -- Expedition V: The Isles by air. The weak force ; Parity, helicity, and chirality ; Mixed messages ; North from South -- Expedition VI: The remote neutrino sector. Massless matter? ; The standard model is dead ; long live the standard model! ; Neutrino badlands -- Expedition VII: Into Bosonia. Symmetry and conservation ; Symmetry and bosons ; Virtual particles and the defense against infinity ; Mass and hidden symmetry ; Electroweak symmetry breaking ; Hunting the Higgs -- Expedition VIII: Far East. Why go? ; Clues and constraints ; Sea monsters and dark matters ; Supersymmetry ; Into another dimension? ; Over the edge ; A fifth force ; Into the cosmos.