This book is a comprehensive study of the life and mathematics of Walter Noll, who is widely known as the creator of the mathematical tools of modern rational mechanics and thermodynamics. It is a must for every physicist, engineer, or graduate student as a reference and key to Noll's mathematical heritage. 1 In the Flatland.- 2 Slave of Istvan Szabó.- 3 Truesdell.- 4 Noll's Odyssey from Los Angeles to Pittsburgh.- 5 "Walter Noll, Our Teacher".- 6 Mathematics Educator, Researcher and Professor, Walter Noll.- Picture Selection.- 7 Annihilators of Linear Differential Operators.- 8 Finite-Dimensional Spaces.- 9 Foundations of Rational Continuum Mechanics.- 10 Rational Fluid Mechanics.- 11 Rational Elasticity.- 12 Rational Thermomechanics.- 13 Neo-Classical Space-Time of Mechanics.- 14 Inhomogeneities in Simple Bodies.- 15 Fit Regions and Contact Interactions.- 16 Foundations of Special Relativity.- Notes.- List of Works of Walter Noll.- Name Index.