* The History and Culture of the Indian People - is a 11 volume encyclopedia edited by R.C. Majumdar. Slightly dated because of when it was published, but it is a scholarly work that will give you plenty of references to other material if you want to dig deep.
* Sri Aurobindo & Swami Vivekananda - Their collected works are available online and you can pick and choose what you want to read because their output was vast.
* Books by K S Lal - historian who wrote a lot of books on the Islamic/medieval period
* Books by Meenakshi Jain - historian
* Books by śatāvadhānī R Ganesh - his Kṣāttra - The tradition of Valor in India is quite good
* Books by Sandeep Balakrishna on the Delhi Sultanate period, Tipu Sultan etc
* Books by Pavan K. Varma
* The Ramakrishna Mission publishes many books on Hinduism. "The Essentials of Hinduism" by Swami Bhaskarananda is a concise introduction to the religion.
There are hundreds of such books. Will add another comment if I can think of them.
The best option is to read good translations of the upanishads, itihasas and puranas. Everything else is based on them. (Easier said than done, though)
Do you recommend any books regarding our civilization, religion ? Ideally in English, I am not a native Hindi speaker.