This book is an evolution of the author's notes on the Special Theory of Relativity course taught to engineering students at the National Technical University of Athens and to students of mathematics and physics at the School of Applied Mathematical and Physical Sciences of the Foundation. The textbook provides a fairly comprehensive presentation of the Special Theory of Relativity for a first encounter with the subject at a university level.

Special emphasis is also given to the experiments conducted to verify the predictions of the theory.

The Special Theory of Relativity has found application in a vast number of problems in physics, and this textbook attempts to present the main applications that every physicist should be aware of.