"From Nucleons to Nucleus" is a specialized book that addresses the individual particle and collective properties of spherical nuclei. It provides a detailed introduction to various nuclear models and their derivations. Using practical examples, the formal framework is applied to light and medium-heavy nuclei. To reinforce the acquired knowledge, the book includes a variety of exercises, many of which connect the models with experimental data. For consistency, the surface delta interaction is used in all applications requiring a configuration mixing. The discussion of nuclear properties takes into account particles, holes, and quasiparticles. Additionally, numerous matrix elements of standard operators are listed for reference. The book is based on the author's lectures on nuclear physics and is aimed at both advanced students and researchers who will appreciate it as a balanced reference for theoretical nuclear physics.