I am not sure if you believe in god or not but I found an interesting book on Atheism and grabbed it when it was free. I read the first chapter where the authors says that he used to believe in god but then turned to atheism when his mother died of terminal cancer. The book has lots of interesting things about atheism in general and what it is and explains why god does not exist. Considering that I actually do believe in god and this book goes against what I actually believe in but nonetheless, a very fascinating read for anyone interesting in this topic.

You can download the book below:

Atheism: Why God Does Not Exist: Atheism Explained