The Road to Serfdom is a book written by Friedrich von Hayek which transformed the landscape of political thought in the 20th century. The Road to Serfdom is among the most influential and popular expositions of classical liberalism and libertarianism.
Instead of reading the entire book you can get a pretty good idea of its main arguments by reading the illustrated version of the Road to Serfdom published in Look Magazine later distributed by the general motors.
Even though Wikipedia isn’t the most reliable resource it gives a good overview of the book. According to this resource – for Hayek this book talks of how “the road to serfdom” inadvertently set upon by central planning, with its dismantling of the free market system, ends in the destruction of all individual economic and personal freedom. Hayek’s central thesis is that all forms of collectivism tend towards tyranny, and he used the Soviet Union and Nazi Germany as examples of countries which had gone down “the road to serfdom” and reached tyranny.