The following books could be used as a starting point for philosophy: 1. Sophie's World by Jostan Judd A popular introductory philosophy novel presented the basic concepts and ways of thinking of philosophy from the perspective of the protagonist, Sophie. 2 Being and Time-Martin Heidegger A philosophical classic that explored the nature of existence and the way humans exist. 3. A Discussion on the Origin and Foundation of Inequality Among Men by Jean-Jacques Russell A classic book on social contracts explored the origins and foundations of social and political systems. 4. On Liberty-John Stuart Mill A liberal classic that explored the nature of freedom and how to achieve it. 5. On Humanity-Robert Dahl A classic book on the theory of democracy explored the basic principles and ways to achieve it. These are some classic introductory books on philosophy. You can choose other books that interest you according to your interests and needs.