The lost symbol by Dan Brown.
This book is very interesting. It's a story about Robert Langdon, whose a professor of symbology at Harvard University and the protagonist of the novel. He went to the United States Capitol to have a speech, but there was a big trouble, his best friend Peter Solomon had been kidnapped. The abductor was a madman of a belief. Robert want to save his friend and also don't wanna lost his own insistence. We find out how did he do both two thing in the same time.
In this book I've been learn a lot of kind of cipher and also some symbol's meaning. For example, the Star of David is the symbol of devil.
It is a really through provoking book it is good for us to read.