I have bought four kindle ebooks. I bought "Speaking of Siva", "A Southern Music", "Cloud Computing", "Bollywood Sounds" recently.
"Speaking of Siva" is about Shaivaism and prayers and meanings. "A Southern Music" is about Carnatic Music. "Cloud Computing" is about the cloud and cloud computing. "Bollywood Sounds" is a book on songs of Bollywood.
I am yet to finish these books but I read them when I get time.