Reddit mentions of The Ramayana: A Modern Retelling of the Great Indian Epic

I too have only Wikipedia'd :)

A pair of great epics that I have read and can give my highest recommendation are the two Hindu epics, the Mahabharata and the Ramayana. They read like mystical, lyrical action adventure books, complete with haughty gods, cruel demons, heroic humans, lots of sex, violence, flying saucers, and battles that span hundreds of pages.

The Bhagavad Gita centers mainly around Krishna, one of Vishnu's most popular avatars. It takes place during a war. The family of Arjuna, who is a king, betrays him. Both sides ask Krishna for aid in the war. To remain neutral, Krishna gives his army to Arjuna's family and Krishna becomes the personal Charioteer of Arjuna. As they are about to enter the war, Arjuna becomes conflicted. Krishna reveals to Arjuna that he is an avatar of the god Vishnu. The entire text is the conversation between Arjuna and Krishna. Krishna gives Arjuna advice on how to live a spiritual life on all accounts. Devotees of Krishna place an extremely high value on the Bhagavad Gita.
Here is a link to an English translated version of the text: https://www.amazon.com/Bhagavad-Easwarans-Classics-Indian-Spirituality/dp/1586380192/ref=sr_1_sc_1?ie=UTF8&qid=1494927615&sr=8-1-spell&keywords=bhagavad+gtia
And here are links to Krishna sites: https://en.wikipedia.org/wiki/Krishna
http://www.krishna.com/info/about-krishna#

Kalki is said to be the last avatar of Krishna. He has yet to be born. At the end of the Kali-yuga (which is the time period we are in,) Kalki is said to be born ina hidden paradise called Shambhala. He will ride across the Earth on a white steed and cleanse the Earth of evil, returning us to a golden age of peace.
here are some links to pages about Kalki:
http://www.yoga-philosophy.com/eng/kalki/kalki.htm
https://en.wikipedia.org/wiki/Kalki

Although this next one is more controversial, a lot of people believe Buddha to be an avatar of Vishnu. There isn't really a specific book or site to go to for this one, but there are several books on Buddhism and documentaries on the Buddha.

Another popular Vishnu avatar is Rama. Rama is said to be the perfect man. His story is told in an epic called the Ramayana, in which his wife is kidnapped and he must rescue her.
English version of Ramayana: https://www.amazon.com/Ramayana-Modern-Retelling-Great-Indian/dp/0865476950/ref=tmm_pap_swatch_0?_encoding=UTF8&qid=1494928047&sr=8-2
Sites for Rama: https://en.wikipedia.org/wiki/Rama

There are a lot more avatars of Vishnu, but these ones are the main ones. For a bigger list, they are links to all of the major ones here: https://en.wikipedia.org/wiki/Vishnu

It's also good to keep in mind that beliefs on who the avatars of Vishnu are vary from region to region and from tradition to tradition.

• I LOVE the Life of Pi. I recommend reading the "editorial reviews" because Amazon does a terrible job summing up how great the book is.
  
• I also highly recommend the Ramayana this is the version I read. I like this retelling because, while long, it give you a sense of what this story truly is--an Indian epic.
  
• Books by Deepak Chopra (I suggest looking through reviews of diff books to see if any catch your eye).
  
• The Universe in a Single Atom: The Convergence of Science and Spirituality
  by the Dalai Lama because it is a very sincere book and I can almost visualize what he is saying.
  
• If you're in the mood for a bit of silliness, I recommend The Year of Living Biblically: One Man's Humble Quest to Follow the Bible as Literally as Possible because while being funny, it does teach you a little bit of the lesser known tenements of Judaism and Christianity.
  
• Last but not least, I recommend reading travel books. If you look for well written (read: not just looking for cheap laughs) books, even if they don't intend to, they inevitably talk about their personal views on the world--their personal religions.