《量子理论》包含了20世纪初期量子理论的开创性著作，它们代表了科学上的突破，从根本上改变了现代知识的面貌：尼尔斯•玻尔（Niels Bohr）的《线谱量子理论》和马克斯•普朗克《量子理论的起源与发展》。

Quantum Theory contains the seminal works of quantum theory from the early years of the 20th Century, representing breakthroughs in science that radically altered the landscape of modern knowledge: Quantum Theory of Line-Spectra by Niels Bohr and The Origin and Development of the Quantum Theory by Max Planck.