All volumes of this free physics textbook are written to entertain pupils, students, teachers and everybody who is curious about the world of motion. These five volumes present established physics. (A bonus volume, on a research topic, is also available.) Here are the tables of contents.

The volume on motion in everyday life

More details on mechanics are given here and on thermodynamics are given here. Both topics are covered in volume I. This first volume explains motion in everyday life with clear language, with few formulae and with many fun facts.


The volume on relativity

More details on volume II, on relativity and cosmology, are given here. Read about the maximum speed in nature, about the maximum force, about the twin paradox, about the curvature of space, and understand why the sky is dark at night.


The volume on electromagnetism

More details on volume III, on electromagnetism and the brain, are found here. Enjoy the many effects of electricity, magnets and light -- from magic to mirages.


The volume on basic quantum theory

More details on volume IV, on quantum physics, are given here. Learn about the smallest amount of change that is observable in nature, how it determines the size of atoms, and how it fixes all colours around us.


The volume on motion inside matter

More details on volume V, on biology, technology and astrophysics, are given here. The fifth volume covers all motion found inside matter: inside materials, inside cells, inside atomic nuclei and inside stars.


The bonus volume

More details on the status and research for the bonus volume, on the strand model, are found here. This sixth volume covers research on an approach to unify fundamental physics, an approach that arose directly from writing the first five textbook volumes. The approach differs from other candidates: all its predictions agree with experiments and all observations about nature, also the ones unexplained after the first five textbook volumes, are explained. The approach is still a topic of research, and thus the sixth bonus volume is not part of the five textbook volumes.