Does reading the holy books of the religion, is mandatory?

No This is not mandatory. Yes its true that from those books we can learn more and also those things reflect in our life and make it happy. But without own interest if we learn it then it is very difficult to understand. and also this become useless. But I don't think so that if anybody start reading these books they feel any boreness. Its realy good and helpful.

I believe that it is not mandatory. Teachings are heard every time a follower/believer go to their respective place of worship/fellowship. However, browsing on the pages of their holy scriptures, one can reflect on it so it is advisable but not forced. What really matters is that we obey the laws of God. Reading a book don't guaranty one to be holy.

It's all about spiritual wisdom..... You must knew your ownself first before reading any of these books.... Don't read any of these books if you have some hatred on it, its useless and its really hard to digest to read when you have a closed heart and closed mind in your ownself....