Theodore Wright's Reviews > The Physical Principles of the Quantum Theory

In this groundbreaking work by Werner Heisenberg, he lays out the general scheme of Quantum Theory. A theory which, relies on strict mathematical rigor to explain concepts which are prohibited by use of the tongue in language. Although this work is very fundamental to particle physics, I would recommend the works of Leonard Susskind and Richard Feynman's introductory lessons on Quantum Theory. As their works rely less on integral Calculus, and more on Algebraic expressions, being easier to read for the layman.